IBM I 1700 manual LCD-Related Symptoms, Keyboard-Related Symptoms, Indicator-Related Symptoms

Symptom/Error					FRU/Action in Sequence
No	beep,		power-on		Ÿ	Battery
indicator			off, LCD		Ÿ	AC Adapter
blank		during		POST
					Ÿ	DC-DC & BATT board
					Ÿ	System board
No	beep,		power-on		Ÿ	Reseat DIMM.
indicator			on,	LCD	Ÿ	CPU card
blank		during		POST
					Ÿ	System board
No	beep		during		Speaker
POST		but	system
runs		correctly.

LCD-Related Symptoms

Symptom/Error				FRU/Action in		Sequence
LCD	backlight not			1.	Reseat		the	LCD	connector.
working				2.	Check	the LCD		inverter ID
LCD	too	dark		3.	LCD FPC
LCD	brightness			4.	LCD inverter
cannot		be	adjusted
				5.	LCD
LCD	contrast		cannot
				6.	System board
be	adjusted
LCD	screen		unread-	1.	Reseat		the	LCD	connector.
able				2. Check the LCD inverter ID
Screen		abnormal		3.	LCD FPC
Wrong color			dis-	4.	LCD inverter
played

5.LCD

6.System board

LCD has extra hori- 1. Check the LCD inverter ID

zontal or vertical lines

2. LCD FPC

displayed.

3.LCD inverter

4.LCD

5.System board

Keyboard-Related Symptoms

Symptom/Error		FRU/Action in Sequence
Keyboard	(one or	1.	Reseat the keyboard	cable.
more keys)	doesn't	2.	Keyboard
work.
		3.	System board

Indicator-Related Symptoms

Symptom/Error		FRU/Action	in Sequence
Indicator incorrectly1. Reseat the LED board.
remains	off	or on, but	LED board
system	runs	2.
		cor-	System board
rectly.		3.

42 ThinkPad 390X / i 1700 HMM