[SOLVED] Hp Pavillion DV1540Ca shuts down after its dust removal

[kumavspanda]

Hi guys
I have a 3yr old hp dv 1540 laptop it was working great. I did not clean dust for so long so I decide to clean my laptop.
I disassembled and put everything back properly and then turn on the laptop. After few minutes or secs the power turned off. I tried about 4times and shuts off even faster. When it's about to turn off, the fan rapidly spins and makes noise.
I have searched information related to this problem and now i am guessing this could be the thermal grease problem. Funny thing is that I only applied air spray on the fan and copper fins to remove dust. I didnt open the heat sink. Is thermal grease can be removed by an air spray?

thank you and sorry about poor eng of mine

[TriggerFinger]

Does it start to boot (i.e. POST, Windows starting, etc.) before it shuts off? If it immediately shuts off like a second or two after powering it ON, check your RAM if they are seated properly in their sockets.

[kumavspanda]

It was on almost up to 10mins and then shuts down, but after many times of trying it doesnt last that long. My laptop usaully shuts down at the windows mode selection screen. ; ( however I will definately re-check the RAM sockets Thank you.

[kumavspanda]

I tired the RAM sockets it was fine i guess something else is causing problems;(

[speedster123]

Did you dislodge the heatsink?
If you moved it slightly, the thermal grease needs to be cleaned and reapplied.
Try removing the battery and unplug the power, let it set for a few hours, then try it again.

[kumavspanda]

what is that metal plate thingy on the left side of the picture?
looks similar to the cpu metal plate do i also have to reapply a thermal grease there as well???

[ahmorrow]

It's the heatsink. You need to apply thermal grease between the metal plate ON the processor and the heatsink. Don't put thermal grease on the metal plate that is the heatsink. Only a small amount though. It doesn't cool anything off, it just spreads heat. So applying too much will do more harm than applying too little.

Just a dab'll do ya. Honestly a dab may be too much.

[kumavspanda]

Thank you for the help
I applied thermal compound called articsilver 5 and laptop is now working
finally
oh btw i applied thermal compound on the cpu heatsink only, because i didnt want to remove the heatpad or something on the fan.

[ahmorrow]

Well, glad that it works at least. Nothing else really matters :-P