Lenovo ThinkPad 390E ThinkPad 390 / i Series 1720 models Hardware Maintenance - Page 45
No Beep Symptoms, LCD-Related Symptoms
View all Lenovo ThinkPad 390E manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 45 highlights
Symptom/Error Operating system not found FRU/Action in Sequence 1. Enter BIOS Setup Utility and see if the hard disk drive and diskette drive A: are properly identified. 2. Diskette drive (FDD ASM) 3. Hard disk drive 4. Planar board No Beep Symptoms Symptom/Error FRU/Action in Sequence No beep, power-on indicator on, LCD blank, no POST Ensure every connector is properly seated. DIMM Reseat CPU card. CPU card Planar board No beep, power-on indicator off, LCD blank during POST Battery ASM AC Adapter DC-DC & BATT board ASM Planar board No beep, power-on indicator on, LCD blank during POST Reseat DIMM. CPU card Planar board No beep during POST but system runs correctly. Speaker LCD-Related Symptoms Symptom/Error FRU/Action in Sequence LCD backlight not working LCD too dark LCD brightness cannot be adjusted LCD contrast cannot be adjusted 1. Reseat the LCD connector. 2. Check the LCD inverter ID 3. LCD FPC ASM 4. LCD inverter 5. LCD 6. Planar board LCD screen unreadable Character missing pels Screen abnormal Wrong color displayed 1. Reseat the LCD connector. 2. Check the LCD inverter ID 3. LCD FPC ASM 4. LCD inverter 5. LCD 6. Planar board LCD has extra horizontal or vertical lines displayed. 1. Check the LCD inverter ID 2. LCD FPC ASM 3. LCD inverter 4. LCD 5. Planar board ThinkPad 390/i Series 1700 37