Laptop boot issues - no post, all lights flash

By Neanderthal ยท 6 replies
Jul 17, 2007
  1. I have a IBM thinkpad, I have had no real issues with it in the years that I have owned it.

    I pressed the power on button yesterday and there was no post and all the lights stated to blink on and off.

    I was unable to power it off by holding the ppower button in and had to remove the power lead and the battery.

    This is something that I have not come accross before, anyone have any suggestions or hard of similar before?

  2. lamo

    lamo TS Rookie

    the model of notebook?
  3. Neanderthal

    Neanderthal TS Rookie Topic Starter

    Its a IBM thinkpad T20
  4. lamo

    lamo TS Rookie

    try to replace the ADP3421 chip.
  5. Neanderthal

    Neanderthal TS Rookie Topic Starter

    Thanks for the advice.

    I will give that a try and let you know
  6. Neanderthal

    Neanderthal TS Rookie Topic Starter

    I just tried to power my laptop up before starting to strip it down.

    I now get a different POST.

    3 short, 3 short, 1 short.

    Could this still be related to the chip?

  7. lamo

    lamo TS Rookie

    DIMM problems. you should check soldering of memory slots via microscopy. if contacts broken - resolder them.
    the ADP 3421 death - is typical problem for all t2x series. the poor soldering of memory slots - too.
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