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CHAPTER 3. TROUBLE SHOOTING
1. Trouble shooting 2. Device problem 3. Power source abnormal 4. Power on problem 5. Power line problem 6. 3.3V/5V problem 7. VTT problem 8. VCC_CORE problem 9. Battery charge problem 10. Sheet Battery charge problem 11. Clock problem 12. MEMORY problem 13. BIOS problem 14. HDD problem 15. LCD problem 16. CRT problem 17. Keyboard problem 18. Touch pad problem 19. Audio problem 20. Modem problem 21. PCMCIA problem 22. IR problem 23. LAN problem 24. USB1 problem 25. USB2 problem 26. USB HUB problem 27. IEEE1394 problem 28. CDROM problem 29. FDD problem 30. PDC Adapter problem
1. Trouble shooting
Start
System work?
Y
Device problem Charge problem
N
Power on
Power LED light?
N
Y
Power source abnormal
Y
BIOSCS# OK?
N
Device problem 2 POWEROK = H?
N
Y
Check R90,R570,U14,U16
N
X504 32.768kHz OK?
Y
VCC_RTC >2.6V
N
Y
Check D16,D18,D20, C160,R125,C152
Check X504,R554, C528,C538
PCIRST# OK? RSTDRV OK?
N
Y
Check U510
N
every Clock OK?
Y
Clock problem
Check U509,U510
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