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Re: T42 PC ThinkPad won't turn on
Try starting without the battery, Then remove the memory, and try starting with each chip one at a time in each slot. Many time this is either a bad battery or a bad memory chip. Also check the power supply with an ohm meter for the proper output. If the supply checks good, and the other two suggestions don't work, then the problem will most likely be with the power management system on the motherboard. If this is the case, then you will either need to have the exact motherboard component traced by a tech, or replace the motherboard.
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Try attaching a vga monitor to the vga port and reboot. If you get a picture, the backlight is probably burned out. You can try just getting the power circuitry that fits in the lid, or replacing the entire screen with the circuit.
Hi, The Thinkpad T42 doesn't have a reset button on it like the older IBM's used to.
There could be a problem with the battery. With the machine turned off remove AC power and then the battery. Plug in AC power again and see if the laptop will boot without the battery. If it boots let it load up as normal and then shut it down again, reinsert the battery and try to boot it up. If it boots fine, if not then there is a problem with the battery.
Yes it is the fan, get a can of compressed air and clean the air vents and the CPU fan with that, also i would check into the CMOS battery as it could be dead and needs replacing. As the laptop starts up hit F1 when you see the IBM logo and check the date and time, that will be a clear indicator IF the CMOS battery is dead because it will not be the right date and time, it should however let you into windows if you put the date and time right (it may take a couple of attempts)
if you are saying that the battery and the adapter can be use on another machine,just plug it in again on the machine and turn it on,if you can see the indicator but no display or the indicator also no light,means your system board is dead.change the system board,nothing else can you do dude.
Try doing a manual system reset. To do this:
1. Remove battery and unplug AC adapter.
2. Press and HOLD power ON button for 30secs. at least
3. Put back the battery and plug back the AC adapter
4. Power ON the laptop as normal.
If the Laptop wont work off the power adepter, it also will not charge. The adepter could be bad (even if showing a power light) or the connector on the laptop could be broken. The best test is to take the battery out, attach the poweradepter and try to start the computer if it starts, your battery is at fault. If nothing, suspect eh charger first. Be sure the pin on the Laptop power connector isn't bent or broken.