TP 770 - Beep/No Beep Symptoms

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Service Hints & Tips

Document ID: DJON-3LXVBW

TP 770 - Beep/No Beep Symptoms

Applicable to: World-Wide

Beep Symptoms

Symptom / Error

FRU / Action in Sequence

Continuous beeps.

System board

One beep and a blank, unreadable, or flashing LCD.

1. Reseat the LCD connector.
2. Reseat the inverter card.
3. Inverter card
4. Video card
5. LCD unit
6. System board
7. DC/DC card

One beep, and the message "Unable to access boot source. "

1. Boot device
2. System board

One long and two short beeps, and a blank or unreadable LCD.

1. System board
2. Video card
3. LCD unit

One long beep followed by four short beeps each time the power switch is operated. (System cannot power-on due to low battery voltage.)

Connect the AC Adapter or install a fully charged battery.

One beep every second. (System is shutting down due to low battery voltage.)

Connect the AC Adapter or install a fully charged battery. (Allow the system to completely shut down before changing the battery.)

Two short beeps with error codes.

POST error. See Numeric Error Codes

Two short beeps with blank a screen.

System board

No Beep Symptoms

Symptom / Error

FRU / Action in Sequence

No beep, power-on indicator not on, and a blank LCD during POST.

1. Go to Power Systems Checkout
2. System board
3. DC/DC card
4. Power sources

No beep, power-on indicator on, and a blank LCD during POST.

1. System board
2. DC/DC card
3. CPU card

No beep, power-on indicator on, and a blinking cursor only during POST.

1. System board
2. CPU card
3. DC/DC card

No beep during POST but system runs correctly.

1. Turn the volume up and check the speaker.
2. Speaker
3. DC/DC card

Search Keywords

Hint Category

Hardware Maintenance Information

Date Created

16-09-97

Last Updated

19-01-99

Revision Date

19-01-2000

Brand

IBM ThinkPad

Product Family

ThinkPad 770, ThinkPad 770E/ED, ThinkPad 770X

Machine Type

9548, 9549, 9544

Model

All

TypeModel

Retain Tip (if applicable)

Reverse Doclinks
and Admin Purposes

Symptom / Error	FRU / Action in Sequence
Continuous beeps.	System board
One beep and a blank, unreadable, or flashing LCD.	1. Reseat the LCD connector. 2. Reseat the inverter card. 3. Inverter card 4. Video card 5. LCD unit 6. System board 7. DC/DC card
One beep, and the message "Unable to access boot source. "	1. Boot device 2. System board
One long and two short beeps, and a blank or unreadable LCD.	1. System board 2. Video card 3. LCD unit
One long beep followed by four short beeps each time the power switch is operated. (System cannot power-on due to low battery voltage.)	Connect the AC Adapter or install a fully charged battery.
One beep every second. (System is shutting down due to low battery voltage.)	Connect the AC Adapter or install a fully charged battery. (Allow the system to completely shut down before changing the battery.)
Two short beeps with error codes.	POST error. See Numeric Error Codes
Two short beeps with blank a screen.	System board

Symptom / Error	FRU / Action in Sequence
No beep, power-on indicator not on, and a blank LCD during POST.	1. Go to Power Systems Checkout 2. System board 3. DC/DC card 4. Power sources
No beep, power-on indicator on, and a blank LCD during POST.	1. System board 2. DC/DC card 3. CPU card
No beep, power-on indicator on, and a blinking cursor only during POST.	1. System board 2. CPU card 3. DC/DC card
No beep during POST but system runs correctly.	1. Turn the volume up and check the speaker. 2. Speaker 3. DC/DC card

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	16-09-97
	Last Updated	19-01-99
	Revision Date	19-01-2000
	Brand	IBM ThinkPad
	Product Family	ThinkPad 770, ThinkPad 770E/ED, ThinkPad 770X
	Machine Type	9548, 9549, 9544
	Model	All
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes