Question about IBM ThinkPad T21 Notebook

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Thinkpad T21 Boot Problems Problems

I recently replaced a bad fan that was causing the laptop to heat up and a LCD screen display that was no good. However, when I turned on the laptop turns on, you can see the lights go on, the LCD screen doesn't turn on but, the fan works now and after about 27 seconds the laptop beeps twice and shuts off automatically. Any ideas what that may be. Thx!!

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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

Posted on Dec 20, 2008

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1 Answer

IBM Thinkpad T21 will not boot, worked fine 30 minutes ago...


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The laptop screen is secured to the laptop with screws at the hinges.
There are usually two screws per hinge. The LCD screen has one ribbon cable and possibly a power connector for the back lighting attached to the motherboard near the hinges. Disconnect these before you lift the LCD off the base, they are under the plastic panel above the function keys next to the hinges.

Feb 03, 2009 | IBM ThinkPad T21 Notebook

1 Answer

Thinkpad t21 screen stopped working


If the computer seems to boot up just fine, but is not displaying a picture, take a flashlight and shine it at an angle on the screen, and see if you can see a very faint image of what should be displayed. If this is the case then the backlight bulb in your LCD panel has burned out. If you do not see anything on the screen at all even under a flashlight, then this could be indicative of a larger problem.

Hook the laptop up to an external monitor to make sure that you get a proper image on there first before you proceed. (Make sure that you try to change the laptop from internal video mode to external video mode if nothing shows up immediately. I have to press the Fn + F7 buttons on my T40p to tell it to use an external video monitor) If nothing shows up on the external monitor, then odds are that something else is wrong. Start by removing sticks of memory one at a time to see if they are causing the system to not boot up. (If memory is the problem, you should hear a series of beeps on startup though). Other complete video failure causes ussually have something to do with the Motherboard, orsome subsystem of it.

If you can see video on the external monitor, then either the LCD panel has gone bad, or the video cable has come unplugged. You can check this on most thinkpads by removing the keyboard and making sure that the video ribbon cable is securely in place.

Jan 11, 2009 | IBM ThinkPad T21 Notebook

1 Answer

Back light on ibm t21


This is an known problem I think you must replace the backlight:
look for example ebay partnr: 260327530145
only for example if this is your problem.

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1 Answer

IBM thinkpad T21 overheating?


Does the battery get very hot? If so try running the laptop with it removed! This problem might also caused by a faulty heat sensor on the motherboard. Given the current cost of new laptops I wouldn't spend a lot of money on any repair options, but you could invest in a "laptop cooler" or chill mat see this link
http://www.quadcooler.com/

Aug 19, 2008 | IBM ThinkPad T21 Notebook

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the lcd display screen has to be set to 1024x768 60hz refresh rate 1st to be able to send the signal to a tv.
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Remove any devices connected and power it on by itslef, either on battery or power source, if it doesnt work, it may have bad processor, When they go bad most laptops wont boot period.

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1 Answer

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you can boot it in safe mode (F8) then change the driver for the display adapter. If you give me a model and type #, I will locate these for you. Will look like 1234-UH7 on the bottom.
STP162

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