Question about IBM ThinkPad T20 2647 Notebook

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Thinkpad T20 won't power up

When I push the power button, the led flashes green for an instant, then immediately goes off, as if something is tripping, like a breaker. I own two other T20's and by swapping parts with the ones that do work, I have eliminated as the cause the battery, charger and the keyboard assembly where the on/off switch is located. Is there a breaker, or reset switch somewhere on the T20 ? Do they have an internal voltage regulator ? What could be the problem ? The laptop is in very good shape and has never been dropped or bumped. It worked fine up until last week when this problem started. Thanks for any assistance you can offer....Mike

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  • thinkpadkid Dec 09, 2007

    Thanks Harvester,

    I spend about a half-hour swapping memory around with the other thinkpads that I have with no luck, but I didn't try pressing on the cover when booting up like you suggested, so I tried that several times this morning with several different pieces of memory and varying degrees of pressure on the cover, but no luck.

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Hi,
I know it sounds wierd, but take out the memory, and install 1 piece from one of the working machines. Put the cover back on, but as you boot, put pressure on the cover, as if to push the memory into the motherboard.
These have this happen alot.
Good luck

Posted on Dec 09, 2007

  • jim walenciak
    jim walenciak Dec 10, 2007

    Ok,

    Well, try a few things;

    Boot without the battery.

    Boot with battery only.

    Another cause for this symptom is the lcd cable may be a bit disconnected, causing a short, which leads me to;

    If you have an ampmeter, or such device as would measure voltage output, with adapter connected, battery out, check with the probes, the voltage going to the various pins in the battery compartment.

    I've got about 30 of these T series in the shop right now, and they can be finnicky about everything.

    Oh, try with hard drive out also.

    Lastly, it's possible you may have a short in the board itself, which means a new board.

    Sorry I couldn't offer more.

    The memory is the #1 problem on these.

    Good luck

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Would like to know the codes for a LG tv, Sony tv, and a TOSHIBA DVD ?


How to Program


Remotes With SET Button
1. Choose and press a device key i.e TV. LED will flash once.
2. Press "SET" Hold until the LED Lights up.
3. Enter the 4-digit Device code (refer code list).
4. The LED will flash once as each number is programmed at the end of the 4 digit the LED will turn off immediately if correct. If the LED flashes then something went wrong in the process. If the first code does not work then repeat the process with the next.
5. Important - Some brands use other manufacturers to make their devices if the codes available do not work the try the MAGIC search function.


Remotes Without SET Button
1. Choose and press a device key i.e TV. LED will flash once.
2. Press and hold BOTH the CHANNEL UP AND VOLUME DOWN button until the LED Lights up.
3. Enter the 4-digit Device code (refer code list).
4. The LED will flash once as each number is programmed, at the end of the 4th digit the LED will turn off immediately if correct. If the LED flashes then something went wrong in the process. If the first code does not work then repeat the process with the next.
5. Important - Some brands use other manufacturers to make their devices if the codes available do not work the try the MAGIC search function.


MAGIC SEARCH FUNCTION
1. The magic search function enables you to scroll through the entire code list one by one by pushing the on/off button. Each time you push the on/off button the remote automatically switches to the next code in the list and sends a signal to the device you have chosen.
2. Choose and press a device key i.e TV. LED will flash once.
3. Press and hold the SET button or if no SET button then hold BOTH the CHANNEL UP AND VOLUME DOWN button until the LED Lights up.
4. Enter the 4-digit Device code (refer MAGIC list) i.e TV is 0001.
5. The LED will flash once as each number is programmed at the end of the 4 digit the LED will turn off immediately if correct. If the LED flashes then something went wrong in the process.
6. Start scrolling by pushing the ON/OFF button as soon as your TV or Chosen device turns OFF lock the code in by pushing the DEVICE key again.

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You can follow these instructions to change the code of yours. Might work for you.

NOTE: You must change the transmitter's code before programming the transmitter to the motor head unit.
The following steps describe the process to change a Quantum™ and Classicdrive™ security code.
This process only works fro transmitters with a GREEN LED and a "U" in their model number, such as "02-3047 2B U" or "02-3047 2B UH".
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2. Continue to hold the button until the GREEN LED begins to flash (approx. 10 seconds).
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4. Continue to hold the button until the GREEN LED begins to flash (approx. 5 seconds).
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Programming Transmitter to Power Head Unit
1. Press the PROGRAM button located on the garage door motor head unit once. The PROGRAM STATUS light on the motor head unit will turn on and remain lit for one minute, indicating that it is ready to learn the Transmitter code.
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If the LED does not turn on when button is pressed, replace battery.



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Power supply


This is a common problem, that involves the power management system on the motherboard. There are few places that can fix the problem, and they will cost you more than replacing the motherboard. I'm going to suggest replacing the motherboard, it's much cheaper and easier than trying to repair the old board. You can find one at a decent price on Ebay. Here's a link for the hardware maintenance manual for the T20 if you would like to replace the board yourself.

ftp://ftp.software.ibm.com/pc/pccbbs/mobiles_pdf/62p9631.pdf

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IBM Thinkpad T20 - Model Type 264784U


I would say the hard drive is failing. But need to run a diagnostic on it to be sure.

If you would like to know where to get the ibm / hitachi hard drive diagostic let me know. It's free for download and you can get a bootable ISO image to burn onto cd. Allowing you to boot from cd in order to test the drive.

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