Dead Laptop??

[herb]

so recently i recieved a "broken" asus x550z. the person who gave it to me simply said it didnt work. i thought that i would be able to fix it because i have fixed many other laptops before. so i took the x550z apart and looked at the motherboard... everything looked good to me and the hardware wasnt even that bad! it was using an amd a10 cpu (not sure which one) and 8 gb of ram. luckilly i had a charger that fit this model. so i charged it for a couple minutes and tryed turning it on and..............no post. the laptop turned on but the display didnt turn on at all and the fans just kept spinning faster and faster! i have tried reseting the cmos and i have tried a bunch of other basic things to try and fix this but i cant figure it out.

im looking for some help.

any ideas are much apreciated. 

[Adorable Cat]

do you think it might be the RAM? if you pull the RAM out will it do the same thing, and have you tried using other sticks?

[Nord]

Most devices act up and/or don't display any picture if the charger does not “match”.

If it boots up on the battery alone, you know it's the charger.

If the same behavior shows up on a battery boot, it's worth a try to unplug the battery and try to boot with the charger alone.

If both fail to boot or to produce some new “errors”, you are most likely looking at some dead hardware inside the device. 

 

My first guess than would go towards thermal problems. Cracked heat pipe, non connecting heatsink, maybe a broken heat sensor on the integrated gpu.
It would make sense, if, for example, the sensor reports 150°C, the device would immediately go full blast on the fans (obviously) and if that does not produce any change, it would most likely shut off or reboot, hence no picture and full speed fans.

Second guess would be the screen > look for a loose or bent / damaged display ribbon cable. Might also only be a broken backlight, depending on what panel it uses, put a flashlight on it to verify. Or the screen is simply broken -> try an external monitor.
Though than there would still be the problem with the fans...

[herb]

hey thanks guys.

 

unfortunatly both of your suggestions failed to work in my favor.

at this point i think the motherboard of the laptop might be the issue because during my small test i noticed the cpu getting really REALLY hot almost immediately, and i have cleaned the coolers and everything so it isnt just any old overheating.

 

[Nord]

Dry thermal paste or worse, incompetent repair that did not repaste after removing the heatsink, could very easily be the casuse if things do get hot quickly.

Apart of a cracked heat pipe or a loose sitting fan and/or loose heatsink, though I would assume that you did check for that.