Having problems with your HP Pavilion ZD7140US Notebook ?

How to reset the motherboard for a HP zd7140us ? I just replaced the heatsink and it worked fine for a week. but now it doesn't turn on, What it could be wrong ? please help.


Answers :

I don't think resetting the BIOS will have the effect you are looking for. Many notebooks hold bios setting differently to a regular PC so removing the bios battery may not work as was suggested. sometimes it requires special procedures and or knowledge to do this with some brands of laptop.
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\015\012I would suspect that when you cleaned the heat-sink on your CPU you may have accidental forgotten to put new thermal compound on
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\015\012Whenever a cooler / heat-sink is removed new compound must be put on tho help spread and dissipate heat. Without this there is a chance that the CPU and motherboard could be damaged.
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\015\012It will do this when it senses that the fan is not working properly or that maybe a setting for the fan is incorrect

First off. If you changed anything using any motherboard / bios utility then change it back or reset defaults.

When you have done that check that the cooling fan / heat-sink for the CPU is secure to the CPU itself (don't remove unless it is loose)

Also check that the fan spins freely.

If it doesn't or feels loose then replace the cooler

Check your manual for the exact instructions but you should remove the cooler completely

DO NOT REMOVE THE CPU

Now with nothing more than isopropynol and cotton bud sticks or another alcohol based cleaner remove the old thermal grease / sticker from the top of the CPU (make sure it is clean)

Do the same with the underside of the cooler.
While the cooler is off it may be worth giving it a good 8low job
.
Now apply some new thermal grease (most computer shops have it)
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Be careful about how much you put on
Here are some basic instructions
Once you have re-assembled your cooler and re-connected it check everything is OK and power up the computer.

If everything went to plan and you did not pop the CPU or motherboard you should now be back in business.
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Look on the motherboard, you'll see a battery. take it out for about 30 second
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