Wireless off mode, Symptom-to-FRU index | Lenovo S230U, 33472YU

When the power is turned on, the computer returns from hibernation mode and resumes operation. The hibernation file in the boot record on the hard disk drive is read, and system status is restored from the hard disk drive.

Wireless off mode

In wireless off mode, the wireless features are turned off to conserve power. To turn off or turn on the wireless features, press F8.

Symptom-to-FRU index

This section contains following information:

•“Numeric error codes” on page 36

•“Error messages” on page 38

•“No-beep symptoms” on page 38

•“LCD-related symptoms” on page 39

•“Intermittent problems” on page 39

•“Undetermined problems” on page 39

The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most likely cause is listed first, in boldface type.

Note: Do the FRU replacement or other actions in the sequence shown in the column headed “FRU or action, in sequence.” If replacing a FRU does not solve the problem, put the original part back in the computer. Do not replace a nondefective FRU.

This index can also help you determine, during regular servicing, what FRUs are likely to need to be replaced next.

A numeric error is displayed for each error detected in POST or system operation. In the displays, n can be any number.

If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not described there, go to “Intermittent problems” on page 39.

Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the manual for that device.

Numeric error codes

Table 2. Numeric error codes

Symptom or error	FRU or action, in sequence

0177	System board.
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.

0183	1. Run the ThinkPad Setup program, and then save
Bad CRC of Security Settings in EFI Variable. Enter the	current setting by pressing F10.
ThinkPad Setup program.	2. System board.

0187	System board.
EAIA data access error—The access to EEPROM is failed.

0188	System board.
Invalid RFID Serialization Information Area.

36Hardware Maintenance Manual

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Lenovo S230U, 33472YU manual Wireless off mode, Symptom-to-FRU index, Numeric error codes

Contents

Hardware Maintenance Manual ThinkPad S230u First Edition September Copyright Lenovo Contents Appendix A. Notices About this manual Iii Iv Hardware Maintenance Manual Safety information General safety Electrical safety Safety inspection guide Safety notices multilingual translations Grounding requirements Safety information Hardware Maintenance Manual Safety information Perigo Perigo Vorsicht Vorsicht Vorsicht Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Strategy for replacing FRUs Important service informationBefore replacing parts Select Drivers & Software How to use error message Dynamic Configure To Order CTOImportant notice for replacing a system board FRU identification for CTO, CMV, and GAV products Using PEWClick Warranty & Services Click Check Warranty Status Custom Model Variant CMV Click Parts & Accessories Click Product & Parts Detail General checkout What to do first Checkout guide Lenovo Solution CenterFollowing are not covered under warranty Quick test programs Uefi diagnostic program Bootable diagnostic programsTests Tools Power system checkout Checking the ac power adapterClick Lenovo Bootable Diagnostics Wire Voltage V dc Checking the battery packChecking the backup battery Checking operational charging Hardware Maintenance Manual Related service information Restoring the factory contents by using Recovery Disc Set Refreshing the computer Passwords Power-on passwordHard-disk password How to remove the hard-disk password Supervisor passwordHow to remove the power-on password Select Power-On Password Hibernation mode Power managementSleep mode Select Master HDP Wireless off mode Symptom-to-FRU indexNumeric error codes 0191 Run the ThinkPad Setup program, and then save Symptom or error FRU or action, in sequence 01890190 Charge the battery pack 0199 Run the ThinkPad Setup program, and then save Error messages No-beep symptomsBeep symptoms Undetermined problems LCD-related symptomsIntermittent problems Reseat the LCD connectors Hardware Maintenance Manual Status indicators Indicator Meaning Indicator Meaning Special keys Special key Description Special key Description Locating computer controls, connectors, and indicators LocationsFront view Rear view Bottom viewLocating FRUs and CRUs CRU statement for customers Description Self-service CRU Optional-service Major FRUs and CRUs CRU LCD FRUs Looking up FRU information Hinge Button board Hardware Maintenance Manual Plastic to plastic FRU replacement noticesScrew notices Logic card to plastic Retaining serial numbers Restoring the serial number of the system unitMTM on rear label Retaining the Uuid Reading or writing the ECA informationProduct ID on rear label Hardware Maintenance Manual Removing or replacing a FRU General guidelines Removing the SIM card Disabling the built-in batteryBefore servicing the computer Hard disk drive or solid-state drive Removing or replacing a FRU Keyboard Removal steps of keyboardStep Screw quantity Color Torque Removing or replacing a FRU PCI Express Mini Card for wireless LAN When installing Removal steps of PCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless WAN Removal steps of mSATA solid-state drive Keyboard bezel, backup battery, and speaker assembly Removal steps of keyboard bezelStep Screw cap Screw quantity Color Torque M2 × 3 mm, wafer-head, nylon-coated Silver 181 Nm Kgf-cm Hardware Maintenance Manual Battery pack Important notices for replacing a battery pack Proximity sensors Removal steps of proximity sensors Removal steps of thermal fan assembly LCD unit Removal steps of LCD unit When installing M2.5 × 3 mm, wafer-head, nylon-coated Silver 181 Nm Kgf-cm DC-in connector Removal steps of DC-in connector System board and base cover assembly Removal steps of system board and base cover assemblyImportant notices for handling the system board Applying labels to the base cover Following illustration shows the location of each label Button bezel LCD panelRemoval steps of button bezel Button board Removal steps of LCD panel Integrated camera Removal steps of button board Hinge Removal steps of integrated cameraRemoval steps of hinge When installing Removal steps of wireless antenna assembly Removing or replacing a FRU Hardware Maintenance Manual Appendix A. Notices Electronic emissions notices TrademarksPage 1P0B48943