IBM Thinkpad 600X erratic boot problem

Maybe nothing but 600's can have problems with the little micro switch that detects the lid closing. Give it a good jiggle, also give it a blow out if you have an air duster.

Laptops are known for having such problems when the battery is poor. You would think that it it was being powered by A/C, that it would not care about the battery. Recently I encountered much the same problem on one. If you can sub a battery pack it might answer that question.

Ken

Both suggestions are good (screen micro switch and the main battery), but as another thought it also could be the BIOS motherboard backup battery is dying (has died) as well. This machine (Thinkpad 600) is likely more than 5 years old so the battery has reached its useful life.

Do let us know what you find at the root cause and good luck.

Bob

In message , Bob Shuman writes

Could also be that if the machine boots but has no LCD display that the CCFL backlight is failing, I've seen it a few times now where they need a few 'prods' with current to get them going. Check if the system works with an external monitor when the display is 'dead'.

Perhaps unlikely, but...reseat the HDD signal and power cables?

Tom

Good point, I had forgotten about that battery.

Ken

The bios battery is something i had in mind as well, where is this battery located on this laptop, hard or easy to reach...?

Bart Bervoets

I don't know about your model, but one I had required the removal of the plastic keyboard top. (Not easy to reach.) If my memory serves me well, it was above the top row of keys and was not a standard coin type battery. Good luck.

It's located in the RAM compartment on the bottom of the laptop. This laptop will give you an error code and refuse to boot if the CMOS battery is bad. Andy Cuffe

snipped-for-privacy@psu.edu