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Laptop turns off after few seconds without displaying anything

indelusionz

Junior Member
well i got this acer laptop compter to repair for someone, but the person didnt supply the adapter for me, i used a 9V adapter on it and nothing happened, then i used a 15V adapter and it turned on for about few seconds and turned off, then i waited for the perosn to give me the adapter which was 19V and when i turned it on, it turned on, but there was no display, the fan turned off, and the lights were still on, it seemed as though the computer was operating without a display or fan, im not sure, can anyone help me?
 
contact acer tech support. they should be able to tell you any status or diagnostic codes that might be showing up that you're not looking for.
 
Try an external display. That kind of problem could be either hardware or software, but if the external display works, you can at least start troubleshooting. Also if you suspect the cooling isn't working, install a utility to monitor the temp, assuming the external display works 😉
 
Did you pull the battery out? sometimes a bad battery can cause odd boot problems. I'd also meter the power adapter output to see if it is ok.
 
In some cases, undervoltage can be more dangerous than overvoltage on components. If the circuitry is fused for overvoltage, you're protected. But there is often no protection from undervoltage, which can be very bad for some circuits.

Try removing all power sources (battery and adapter), and hold down the power button for about 30 seconds. That should bleed off any capacitive charges in the system. Then, reinstall the battery and the charger, and try booting and going right to the BIOS.

If you see the same problem, you're probably SOL.
 
Also as I mentioned before, meter the power adapter to see that it has the right voltage. A bad power adapter can cause you major issues same as a PSU in a desktop.
It is likely a DC power adapter, so ensure it is a clean 19v supply. I'm assuming you have some basic electronics knowlege as you are fixing this for someone else, but if not, just let us know and myself or someone else here is sure to be able to help.
 
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