HTC MDA2 service manual Data Retention related problem, Battery Pack does not start

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6A Data Retention related problem

(1)Back up battery is rechargeable, to retention purpose when main battery power is used up or when changing the main battery, Make sure to charge the unit if not use for a while.

(2)Data introduced by User might be lost when Battery has drained completely.

(3)Ask user to charge the Main Unit when latest warning message pops up.

(4)Ask users to back up their data to the PC or SD card when expect stop using the unit for long period of time, for example, more than one week.

(5)Charge the Main Unit and check if data looses even the Battery pack is charged or at least The unit still can be powered on without AC Adapter.

(6)Check whether AC Adapter is functioning properly.

(7)Check whether the condition of Battery Charging status is correct.

(8)Check the appearance of Battery Pack.

(9)Replace Battery Pack if necessary

(10)Replace Main Board if necessary.

(11)Once the defective part has been identified, verify it again with the defective part whether the symptom could be duplicated.

7A Battery Pack does not start

(1)Make sure the Battery lock is closed properly. Data introduced by User might be lost when Battery has drained completely.

(2)Connect to the AC Adapter and see if it takes charge. Also check AC Adapter condition.

(3)Ask users to back up their data to the PC or SD card when expect stop using the unit for long period of time, for example, more than one week.

(4)Charge the Main Unit and check if data looses even the Battery pack is charged or at least The unit still can be powered on without AC Adapter.

(5)Check whether AC Adapter is functioning properly.

(6)Check whether the condition of Battery Charging status is correct.

(7)Dismantle the unit and check the appearance of Battery Pack.

(8)Try with another Battery Pack or Replace Battery Pack if necessary

(9)Try with another Main Board or Replace Main Board if necessary.

(10)Once the defective part has been identified, verify it again with the defective part whether the

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Contents For MDA2 APP D Table of contents 2Specifications of MDA2 Product SpecificationsIntroduction GSM/GPRS Functional Block Specification of AC AdapterPDA Functional Block GPRS/GSMTotal 43 CONT.ON page no Total 43 CONT.ON page no TTE System Block Diagram Servicing Tools Disassembling Assembling and DisassemblingTotal 43 CONT.ON page no Total 43 CONT.ON page no Total 43 CONT.ON page no Use tweezers to remove the Vibrator Speaker Total 43 CONT.ON page no Gasket LCM Poron Total 43 CONT.ON page no Total 43 CONT.ON page no Tips Antenna AssemblyFIX Antenna Cover Test List of Test Jigs Problem DiagnosticsClassification of Non-Conformity Touch Panel Does Not Respond to Screen Tap SD Card cannot be used Buttons Do Not RespondUnusual Vertical / Horizontal lines or partial display Back Light Does Not Turn ON/OFFPC Connection USB / Serial not possible Wireless Connection GSM / WAP / Gprs not possibleIrDA Connection not possible Battery Pack does not start Data Retention related problemNo Recorded Sound or Distorted sound Battery discharges quickly even after fully chargedBattery Pack does not recharge No Sound from Speaker or Distorted soundHousing Cosmetic damage Clean Talk Time Diagnostic ProgramStop on fail Checksum Refurbishment Exploded Diagrams & Spare part list Spare part list Customer, Retailer Misjudgment AppendixResponse HTC confidential Repair Troubleshooting Guide
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