IBM T21> black display, power is on, fan is on, hdd

Below are IBM BIOS Beep codes that can occur. However, because of the wide variety of models shipping with this BIOS, the beep codes may vary. Beep Code Description Document No Beeps No Power, Loose Card, or Short. CH000312 1 Short Beep Normal POST, computer is ok. No problem 2 Short Beep POST error, review screen for error code. See screen Continuous Beep No Power, Loose Card, or Short. CH000607 Repeating Short Beep No Power, Loose Card, or Short. CH000607 One Long and one Short Beep Motherboard issue. CH000607 One Long and Two Short Beeps Video (Mono/CGA Display Circuitry) issue. CH000607 One Long and Three Short Beeps. Video (EGA) Display Circuitry. CH000607 Three Long Beeps Keyboard / Keyboard card error. CH000304 One Beep, Blank or Incorrect Display Video Display Circuitry. CH000607

Hi

THe most common beeps that you will encounter 95% of the time in repairing PC's are:

1 beep - computer ok
continous beeps / long beeps - memory error
continous short beeps - bios boot block/corrupted bios
1 long beep followed by 3 short beeps - video card error


or this might help

you can check out this list



AMI BIOS

1 short - Computer ok
2 short - RAM failure
3 short - Parity RAM failure
4 short - System timer failure
5 short - Motherboard failure
6 short - Keyboard controller error
7 short - CPU failure
8 short - Video RAM failure
9 short - ROM BIOS error
10 short - CMOS read/write error
11 short - Cache RAM error
1 short, 3 long - Memory failure
1 short, 8 long - Video adapter failure

Check board/chipset makers website for more infomation.

AWARD BIOS

1 long - Memory error
1 long, 2 short - Video error
1 long, 3 short - Video failure
Continuous beeps - Memory or video failure

note that AWARD relies on motherboard manufacturers to develop their own beep codes - the above are only their own internal codes. You will need to refer to your own manual for an explanation of precise codes.


Standard IBM beep codes.

No beep - Power supply or motherboard failure
1 short - System is ok
2 short - POST error (code displayed on screen)
Repeating short - Motherboard failure
1 long, 1 short - Motherboard failure
1 long, 2 short - Video display adapter failure
1 long, 3 short - Video display adapter error
3 long - Keyboard error


Pheonix beep codes

1-1-3 CMOS memory failure
1-1-4 BIOS failure
1-2-1 System timer error
1-2-2 Motherboard error
1-2-3 Motherboard error
1-3-1 Motherboard error
1-4-1 Motherboard error
1-4-2 Memory error
2-x-x Memory failure (any number of other beeps)
3-1-x Chipset error (any number of other beeps)
3-2-4 Keyboard controller error
3-3-4 Video adapter failure
4-2-4 Expansion card failure
4-3-4 Time of day clock failure
4-4-1 Serial port error
4-4-2 Parallel port error
4-4-3 Math co-processor error


pls rate as fixya if it helps. thanks

Go to another pc and lookup the beep codes.

Here are the beep codes for the Thinkpad:" Continuous beeping System board failure One beep; Unreadable, blank or flashing LCD LCD connector problem; LCD backlight inverter failure; video adapter faulty; LCD assembly faulty; System board failure; power supply failure One beep; Message "Unable to access boot source" Boot device failure; system board failure One long, two short beeps System board failure; Video adapter problem; LCD assembly failure One long, four short beeps Low battery voltage One beep every second Low battery voltage Two short beeps with error codes POST error message Two short beeps System board failure.

Standard Original IBM POST Error Codes 1 short beep Normal POST - system is ok 2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem 1 long, 1 short beep System board problem 1 long, 2 short beeps Display adapter problem (MDA, CGA) 1 long, 3 short beeps Enhanced Graphics Adapter (EGA) 3 long beeps 3270 keyboard card

Hi,

Check the ram or install another ram if you have a spare.
If you need more information, reply me soon.
Thanks .

check out your memory ram, try to replace it and switch on again,..also check your cmos battery, if it is low, then replace a new one....last options are to check and change the processors..try it

how many times it beeps is an indication of the problem
1 short beep
Normal POST - system is ok 2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem 1 long, 1 short beep System board problem 1 long, 2 short beeps Display adapter problem (MDA, CGA) 1 long, 3 short beeps Enhanced Graphics Adapter (EGA) 3 long beeps 3270 keyboard cardhope this helps.

i thnk maybe you ram is the culprit try to place the ram firmly in th socket to start your Thinkpad.... the beeps represent a hardware fault
you might have to count the beeps and tell me how many are exactly there?

This is caused by a system board failure. Take the laptop apart again and check all of your connections. Also make sure the ram and processor are seated correctly. You can also try hooking up an external monitor to see if any errors display. This may be an indication that the video cable connected to the system board is not fully connected.

From IBM website:
Two short beeps - System board failure