Display Test Tests and Diagnostics | Toshiba 960-498 guide

3.9 Display Test

3 Tests and Diagnostics

Subtest 06 “H” Pattern Display

This subtest displays a full screen of “H” patterns.

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

To exit this subtest and return to the DISPLAY TEST menu, press Enter.

NOTE: The last row may not be completely filled. This condition does not indicate an error.

Subtest 07 LCD Brightness

The LCD brightness changes in the following order:

Super-Bright —> Bright —> Semi-Bright —> Bright —> Super-Bright

After displaying with Super-Bright of LCD brightness, the screen returns to the DISPLAY TEST menu.

3-20	QOSMIO F10 Maintenance Manual (960-498)

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Toshiba 960-498 manual Display Test Tests and Diagnostics

Contents

Qosmio F10 File Number Trademarks Safety Precautions Preface Qosmio F10 Maintenance Manual Conventions Acronyms Table of Contents Chapter Tests and Diagnostics Chapter Replacement Procedures HDD Appendices Qosmio F10 Maintenance Manual Hardware Overview Hardware Overview Chapter Contents Figures Tables Features Hardware Overview Features Features Hardware Overview LCD LAN/MODEM Front of the computer and the system units configuration System Block Diagram Hardware Overview System Block Diagram System Block Diagram Hardware Overview CPU Hardware Overview System Block Diagram − Tmds Hardware Overview System Block Diagram Standard value Parameter 2.5-inch Hard Disk Drive2.5-inch Hard Disk Drive Hardware Overview Parameter Standard value 2.5-inch HDD dimensions 2/2Hardware Overview 2.5-inch Hard Disk Drive Specification Hgst Parameter Inch HDD specifications 1/2Specification Toshiba Parameter 2.5-inch HDD specifications 2/2 Specification Fujitsu Parameter Optical Drive Optical Drive Hardware Overview Hardware Overview Optical Drive DVD Super Multi drive specifications 1/4Parameter Drive Specification DVD Super Multi drive specifications 2/4 Usrw 10X CLV Supporting Double Layer DVD Super Multi drive specifications 3/4Matsushita G8CC00021611 DVD Super Multi drive specifications 4/4 Teac G8CC00024611 Keyboard Hardware Overview Keyboard TFT Color Display Hardware Overview SpecificationsTFT Color Display LCD Module FL Inverter Board FL inverter board specificationsHardware Overview TFT Color Display G71C0004F310 Power supply output rating 1/2 Power SupplyPower Supply Hardware Overview Name Voltage Hardware Overview Power Supply Power supply output rating 2/2 Battery Name Battery Element Output Voltage Capacity Battery specificationsMain Battery Batteries Hardware Overview Batteries Battery Charging ControlTime required for charges of main battery 10 Data preservation time Condition Time RTC Battery11 Time required for charges of RTC battery AC Adapter AC adapter specificationsSpecification Hardware Overview AC Adapter AC Adapter Hardware Overview Chapter Troubleshooting Procedures Troubleshooting Procedures Power Status Check Troubleshooting Procedures Troubleshooting flowchart Set of tool for debug port test Qosmio F10 Maintenance Manual Troubleshooting Troubleshooting Flowchart Troubleshooting Flowchart Troubleshooting Procedures Troubleshooting Procedures Troubleshooting Flowchart Troubleshooting flowchart 1/2 Troubleshooting flowchart 2/2 Troubleshooting Procedures Troubleshooting Flowchart Procedure 1 Power Status Check Power Supply TroubleshootingPower Supply Troubleshooting Troubleshooting Procedures Battery icon DC in icon Troubleshooting Procedures Power Supply TroubleshootingDC in icon Power supply status Procedure 2 Error Code Check Error code Meaning Error codeError code Where error occurs ‰ Main Battery ‰ 1R5-C1V output ‰ E3V output ‰ 2R5-B2V output Procedure 3 Connection Check Procedure 4 Charging Check Procedure 5 Replacement Check System Board Troubleshooting System Board Troubleshooting Troubleshooting Procedures Troubleshooting Procedures System Board Troubleshooting Procedure 1 Message Check KBC Error HDC Error Procedure 2 Debug Port Check A set of tool for debug port test Debug port Boot mode error status 1/9 Check SUM Check Debug port Boot mode error status 2/9 Beep Debug port Boot mode error status 3/9 Cmos Debug port Boot mode error status 4/9 Debug port Boot mode error status 5/9 VGABUS=0 Debug port Boot mode error status 6/9 Pciconfiguration Debug port Boot mode error status 7/9 Irterrstsbuf Debug port Boot mode error status 8/9 Prebootsetup Debug port Boot mode error status 9/9 Debug port Suspend mode error status 1/3 Debug port Suspend mode error status 2/3 LED Status Test item Contents Debug port Suspend mode error status 3/3 LED Status Test item Contents Debug port Resume mode error status 1/4 Debug port Resume mode error status 2/4 FDD Debug port Resume mode error status s 3/4 SIO Debug port Resume mode error status 4/4 Procedure 3 Diagnostic Test Program Execution Check Procedure 4 Replacement Check Procedure 1 FDD Head Cleaning Check USB 3.5 FDD TroubleshootingTroubleshooting Procedures USB 3.5 FDD Troubleshooting FDD error code and status USB 3.5 FDD Troubleshooting Troubleshooting ProceduresProcedure 2 Diagnostic Test Program Execution Check Code Status Procedure 3 Connector Check and Replacement Check Procedure 1 Partition Check 2.5 HDD Troubleshooting2.5 HDD Troubleshooting Troubleshooting Procedures Troubleshooting Procedures 2.5 HDD Troubleshooting Procedure 2 Message Check Procedure 3 Format Check Procedure 4 Diagnostic Test Program Execution Check 2.5 Hard disk drive error code and status Procedure 5 Connector Check and Replacement Check Procedure 1 Diagnostic Test Program Execution Check Keyboard TroubleshootingTroubleshooting Procedures Keyboard Troubleshooting Procedure 2 Connector Check and Replacement Check Touch Pad Troubleshooting Touch Pad Troubleshooting Troubleshooting Procedures Procedure 1 External Monitor Check Display TroubleshootingTroubleshooting Procedures Display Troubleshooting Display Troubleshooting Troubleshooting Procedures Procedure 3 Connector Check and Cable Check Procedure 4 Replacement Check Optical Drive Troubleshooting Optical Drive Troubleshooting Troubleshooting Procedures Modem Troubleshooting Troubleshooting Procedures Modem Troubleshooting Modem Troubleshooting Troubleshooting Procedures LAN Troubleshooting Troubleshooting Procedures LAN Troubleshooting Procedure 1 Transmitting-Receiving Check Wireless LAN TroubleshootingWireless LAN Troubleshooting Troubleshooting Procedures Troubleshooting Procedures Wireless LAN Troubleshooting Procedure 2 Antennas Connection Check Procedure 3 Replacement Check Procedure 2 Connector Check Sound TroubleshootingTroubleshooting Procedures Sound Troubleshooting Sound Troubleshooting Troubleshooting Procedures Procedure 1 Connector Check and Replacement Check TV Tuner TroubleshootingTroubleshooting Procedures TV Tuner Troubleshooting TV Tuner Troubleshooting Troubleshooting Procedures Chapter Tests and Diagnostics Qosmio F10 Maintenance Manual Qosmio F10 Maintenance Manual Iii 31.1 Function Description Accessing the Setup Program Qosmio F10 Maintenance Manual Qosmio F10 Maintenance Manual Diagnostics menu Diagnostic TestTests and Diagnostics Diagnostic Test Diagnostic Test Tests and Diagnostics ‰ NDP Test ‰ Expansion Test ‰ CD-ROM/DVD-ROM Test 2 H/W Hardware initial information setting tool Heatrun test program Diagnostics menu T&D Executing the Diagnostic TestExecuting the Diagnostic Test Tests and Diagnostics Tests and Diagnostics Executing the Diagnostic Test System Test Name 2 H/W initial information setting tool Setting of the hardware configuration Setting of the hardware configuration Tests and Diagnostics Tests and Diagnostics Setting of the hardware configuration Press Enter key Tests and Diagnostics Heatrun Test Heatrun Test Subtest names 1/2 Subtest Names Tests and DiagnosticsSubtest Names Test Name Subtest No Subtest Name Tests and Diagnostics Subtest Names Subtest names 2/2 System Test Tests and Diagnostics System Test Tests and Diagnostics System Test Memory Test Tests and Diagnostics Memory Test Tests and Diagnostics Keyboard Test Keyboard Test Display Test Tests and Diagnostics Display Test Tests and Diagnostics Display Test Display Test Tests and Diagnostics Tests and Diagnostics Floppy Disk Test Floppy Disk Test Floppy Disk Test Tests and Diagnostics Tests and Diagnostics Printer Test Printer Test Printer Test Tests and Diagnostics Tests and Diagnostics Async Test Async Test Hard Disk Test Tests and Diagnostics Hard Disk Test Tests and Diagnostics Hard Disk Test Worst pattern data Cylinder Real Timer Test Tests and Diagnostics Real Timer Test Real Timer Test Tests and Diagnostics Tests and Diagnostics NDP Test NDP Test Expansion Test Expansion Test Tests and DiagnosticsSub# Address Good Bad Contents Tests and Diagnostics Expansion Test CD-ROM/DVD-ROM Test Tests and Diagnostics CD-ROM/DVD-ROM Test Error codes and error status names 1/3 Error Code and Error Status NamesTests and Diagnostics Error Code and Error Status Names Device name Error code Error status name Error Code and Error Status Names Tests and Diagnostics Error codes and error status names 2/3 Error codes and error status names 3/3 Hard Disk Test Detail Status Hard Disk Test Detail Status Tests and DiagnosticsHard disk controller status register contents Tests and Diagnostics Hard Disk Test Detail Status Error register contents Program Description Operations If Test OK, Press DellEnterkey Subtest 02 Touch Pad Subtest 03 GP Button Kill Switch on Confirm corresponding LED lights properly Press Enter and following message appears in the display Function Description Head CleaningTests and Diagnostics Head Cleaning Log Utilities Tests and Diagnostics Log Utilities Tests and Diagnostics Log Utilities 00 00 0000 FDD-WRITE Protected Running Test Tests and Diagnostics Running Test Tests and Diagnostics Floppy Disk Drive Utilities Floppy Disk Drive Utilities Floppy Disk Drive Utilities Tests and Diagnostics Floppy Disk Format & Copy DIAGNOSTICS-HARD Disk & Floppy Disk Dump Following message will appear. To finish the dump, select System Configuration System Configuration Tests and Diagnostics Tests and Diagnostics System Configuration System Configuration Display Ver X.XX Machine Name ??? Wireless LAN Test Program Intel-made b/g MAC = Setting the responder machine Bad connection of wireless LAN antenna cable Main Wireless LAN Test Program Intel-made a/b/g SKU NG Aux Antenna Test NG 11a Communication Test NG Qosmio F10 Maintenance Manual Setting the tester DUT machine Wireless LAN Test Program Askey-madeTests and Diagnostics Wireless LAN Test Program Askey-made Wireless LAN Test Program Askey-made Tests and Diagnostics 11a Communication Test NG Please refer to log. txt Wireless LAN Test Program Askey-made Tests and Diagnostics 29 LAN/Modem/Bluetooth/IEEE1394 Test Program LAN test Transmit Receive Qosmio F10 Maintenance Manual Modem test Modem loopback test Bluetooth test Sssss Error message Message Contents Error code for Bluetooth test Bdaddr 1/2 Error code for Bluetooth test Bdaddr 2/2 Progress Bar Is displayed Error code for Bluetooth test Bdaddr of the DUT 1/2 Error code for Bluetooth test Bdaddr of the DUT 2/2 IEEE1394 test Sound Standard test Sound Test program Tests and DiagnosticsSound Test program Recorded from internal microphone Tests and Diagnostics Sound Test program Sound Legacy test CD Sound Standard test Pass Count Write Data Read Data Address Xxxxxx Status XXX Tests and Diagnostics Sound Test program CD Sound Legacy test Setup Tests and Diagnostics Setup Setup Tests and Diagnostics Accessing the Setup Program Factory Preset Configuration Moving Within the Setup Menu and Changing ValuesAccepting Changes and Exiting the Setup Window HDD Mode Password Write Policy Setup Options System Date Sets date System Time Sets time Using the AC adapter Low Maximum Performance Tests and Diagnostics Setup Ntsc US Dynamically Switchable Off CD-ROM Enhanced IDE normal Qosmio F10 Maintenance Manual 103 104 Chapter Replacement Procedures Replacement Procedures 14.1 Replacement Procedures Figures 50 to 4-54 Replacing Samsung fluorescent lamp W-XGA Replacement Procedures Overview Overview Overview Replacement Procedures Safety Precautions Before You Begin Disassembly Procedure Assembly Procedure Tools and Equipment Screw Tightening Torque Grip Color Screw Notation Battery pack Removing the battery pack Battery pack/PC card/Bridge MediaBattery pack/PC card/Bridge Media Replacement Procedures Replacement Procedures Battery pack/PC card/Bridge Media Installing the battery pack Installing the PC card PC card Removing the PC card Installing the Bridge media Removing the bridge media Removing the HDD HDD Replacement ProceduresHDD Replacement Procedures HDD Removing the HDD Installing the HDD Removing the memory module Replacement Procedures Memory moduleMemory module Memory module Replacement Procedures Installing the memory module Keyboard Removing the keyboard Keyboard/BluetoothReplacement Procedures Keyboard/Bluetooth Removing the keyboard Remove the keyboard support plate Keyboard/Bluetooth Replacement Procedures Installing the keyboard Bluetooth Removing the Bluetooth Installing the Bluetooth Removing the switch membrane Switch membraneSwitch membrane Replacement Procedures Replacement Procedures Switch membrane Installing the switch membrane Optical drive Replacement Procedures Removing the optical drive Replacement Procedures Optical drive Installing the optical drive Removing the display assembly Display assemblyDisplay assembly Replacement Procedures Replacement Procedures Display assembly 15 Removing the screws front 16 Removing the cables 17 Removing the display assembly 18 Removing the wireless LAN antenna cables Installing the display assembly SD board Removing the SD board SD board/MDC Replacement ProceduresSD board/MDC Replacement Procedures SD board/MDC Installing the SD board Installing the MDC MDC Removing the MDC 10 Fan Replacement Procedures 10 FanInstalling the fan Removing the fan Removing the wireless LAN board Wireless LAN boardWireless LAN board Replacement Procedures Installing the wireless LAN board Removing the system board Replacement Procedures System boardSystem board System board Replacement Procedures 24 Removing the system board Installing the system board Removing the RTC battery RTC batteryRTC battery Replacement Procedures Installing the RTC battery TV tuner module Removing the TV tuner module Replacement Procedures TV tuner module/GuideTV tuner module/Guide Guide Removing the guide TV tuner module/Guide Replacement ProceduresInstalling the TV tuner module Installing the guide 27 Removing the guide Removing the heat sink/CPU Heat sink/CPU Replacement ProceduresHeat sink/CPU Replacement Procedures Heat sink/CPU Installing the heat sink/CPU 30 Applying silicon grease VGA Heat sink Replacement Procedures VGA Heat sinkInstalling the VGA heat sink Removing the VGA heat sink PC card cover PC card cover4 Replacement ProceduresInstalling the PC card cover Removing the PC card cover Removing the Speaker/VGA fan Replacement Procedures Speaker/VGA fanSpeaker/VGA fan Speaker/VGA fan Replacement Procedures Installing the Speaker/VGA fan Removing the battery latch Battery latchReplacement Procedures Battery latch Battery latch Replacement Procedures Installing the battery latch Removing the touch pad Replacement Procedures Touch padTouch pad Touch pad Replacement Procedures Installing the touch pad Removing the SJ board Replacement Procedures SJ boardSJ board SJ board Replacement Procedures Installing the SJ board Microphone Replacement Procedures MicrophoneInstalling the microphone Removing the microphone Removing the LCD unit/FL inverter LCD unit/FL inverter Replacement ProceduresLCD unit/FL inverter Replacement Procedures LCD unit/FL inverter 40 Removing the FL inverter 41 Removing the LCD unit 42 Removing the LCD supports LCD unit/FL inverter4 Replacement Procedures Installing the LCD unit/FL Inverter Wireless antennas Removing the wireless antennas Wireless antennas/ LCD harnessReplacement Procedures Wireless antennas/ LCD harness Wireless antennas/ LCD harness Replacement Procedures Installing the wireless antennas LCD harness Removing the LCD harness 45 Removing the LCD harness holder display cover side Installing the LCD harness 46 Removing the LCD harness holder middle frame side Removing the Hinge Replacement Procedures HingeHinge Hinge Replacement Procedures 48 Removing the hinge display cover side Installing the Hinge Appendices Appendices Appendix Contents Precautions for handling the LCD module Appendix a Handling the LCD Module Appendix a Handling the LCD Module Appendix a Handling the LCD Module Appendix a Handling the LCD Module Appendix a Handling the LCD Module Appendix a Handling the LCD Module App-iv Qosmio F10 Maintenance Manual Appendix G Appendix D Keyboard Scan/Character Codes Appendix EAppendix F Appendix H Figure B-1 System board layout front Table C-15 Sound board I/F connector 50-pin Table D-7 System Board Front View Figure B-1 System board layout front Mark Number Table B-1 System board ICs and connectors frontSystem Board Front View Appendix B Board Layout System Board Back View Appendix B Board Layout System Board Back View Mark Number Name Table B-2 System board ICs and connectors backSystem Board Back View Appendix B Board Layout SD Board Front View Appendix B Board Layout SD Board Front View SD Board Back View Appendix B Board Layout Mark Number Name CN3000 MDC I/F connectorSD Board Back View SJ Board Front View Appendix B Board Layout SJ Board Front View SJ Board Back View SJ Board Back View Appendix B Board Layout PIN No Signal name System Board Fclsy CN1800 HDD I/F connector 44-pinTable C-1 HDD I/F connector 44-pin Table C-2 ODD I/F connector 50-pin CN1820 ODD I/F connector 50-pinCN1820 ODD I/F connector 50-pin Appendix C Pin Assignment CN2110 PC card I/F connector 70-pin Table C-3 PC card I/F connector 70-pin 1/2 Table C-4 Keyboard I/F connector 34-pin CN3230 Keyboard I/F connector 34-pinTable C-3 PC card I/F connector 70-pin 2/2 CN8490 RTC battery connector 3-pin CN4400 Bluetooth I/F connector 20-pinCN8810 1st battery connector 10-pin 10 CN4611 USB connector 0 port 0 4-pin CN8770 FAN connector 3-pinCN8780 FAN connector for VGA 3-pin CN8770 FAN connector 3-pin Appendix C Pin Assignment 13 CN4631 USB connector 2 port 3 4-pin 11 CN4612 USB I/F Relay connector 8-pin12 CN4630 USB connector 1 port 2 4-pin 14 CN8800 DC in connector 4-pin 15 CN9500 Sound board I/F connector 50-pin Table C-15 Sound board I/F connector 50-pin Table C-16 Switch I/F connector 20-pin 16 CN9650 Switch I/F connector 20-pin17 J4100 Network I/F connector 12-pin Table C-17 Network I/F connector 12-pin Table C-18 1394 I/F connector 4-pin 18 CN4200 1394 I/F connector 4-pin19 IS2101 Media Bridge I/F connector 42-pin Table C-19 Media Bridge I/F connector 42-pin 20 CN1400 Memory connector a 200-pin Table C-20 Memory connector a 200-pin 1/3 Table C-20 Memory connector a 200-pin 2/3 Table C-20 Memory connector a 200-pin 3/3 21 CN1401 Memory connector B 200-pin Table C-21 Memory connector B 200-pin 1/3 Table C-21 Memory connector B 200-pin 2/3 Table C-21 Memory connector B 200-pin 3/3 22 CN2200 Mini PCI I/F connector 124-pin Table C-22 Mini PCI I/F connector 124-pin 1/2 Table C-22 Mini PCI I/F connector 124-pin2/2 23 CN2400 WW Tuner I/F connector 124-pin Table C-23 WW Tuner I/F connector 124-pin 1/2 Table C-23 WW Tuner I/F connector 124-pin2/2 Appendix C Pin Assignment 24 CN3201 PAD I/F connector 4-pin 24 CN3201 PAD I/F connector 4-pin25 PJ5600 LCD I/F connector 41-pin Table C-24 PAD I/F connector 4-pin 28 CN3400 Debug port 4-pin 26 CN5080 CRT I/F connector 15-pin27 CN5501 S-video I/F connector 4-pin Table C-29 D-video I/F connector 14-pin 29 CN5502 D-video I/F connector 14-pin30 CN5801 TV Input connector 14-pin Table C-30 TV Input connector 14-pin Table C-31 MDC I/F connector 30-pin SD Board Fclsd 31 CN3000 MDC I/F connector 30-pin32 CN4620 USB I/F Relay connector 8-pin Table C-32 USB I/F Relay connector 8-pin 35 CN6003 Speaker right connector 2-pin 33 CN4621 USB I/F connector port 4 4-pin34 CN6002 Speaker left connector 3-pin 36 CN9550 Sound jack board I/F connector 21-pin Table C-36 Sound jack board I/F connector 21-pin 37 CN9510 System board I/F connector 50-pin Table C-37 System board I/F connector 50-pin 40 J9612 Composite-in connector 5-pin 38 J2410 TV Antenna connector 4-pin39 CN2410 Coaxial connector 4-pin 41 CN9613 S-video connector 4-pin Table C-42 TV-tuner connector 12-pin 42 CN9614 TV-tuner connector 12-pin43 CN9615 SVP connector 14-pin Table C-43 SVP connector 14-pin Table C-44 Internal Microphone I/F connector 2-pin 45 J6001 External Microphone I/F connector 6-pin46 DS6000 Headphone connector 8-pin Table C-45 External Microphone I/F connector 6-pin 47 CN9560 Sound board I/F connector 21-pin Table C-47 Sound board I/F connector 21-pin Qosmio F10 Maintenance Manual Table D-1 Scan codes set 1 and set 2 1/4 Cap Keytop Code set Make Break Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes set 1 and set 2 2/4 Table D-1 Scan codes set 1 and set 2 3/4 ALT R Table D-1 Scan codes set 1 and set 2 4/4 Table D-2 Scan codes with left Shift key Cap Code set Keytop Make Break Table D-3 Scan codes in Numlock modeTable D-4 Scan codes with Fn key Table D-5 Scan codes in overlay mode Table D-6 No.124 key scan code Table D-7 No.126 key scan code Key Shift Code set Top Make Keyboard Layout Figure E-1 Keyboard layout for US Keyboard Layout Appendix E Key Layout LAN Loopback Connector Figure F-1 LAN loopback connector LAN Loopback Connector Appendix F Wiring Diagrams Rewriting the Bios Tools Appendix G Bios Rewrite Procedures Appendix H EC/KBC Rewrite Procedures Rewriting the EC/KBC Appendix H EC/KBC Rewrite Procedures Appendix I Reliability Table I-1 Mtbf Appendix I Reliability