hey folks got a hp laptop with a problem, think it might be a bad ac adapter, already changed out the motherboard due to a laptop repair shops recommendation, now $200 less in my pocket and still a dead laptop. when i try turning on the laptop occasionally it will just shut right off, then other times it will power on but the display is very dim and only shows the HP logo like it would if it was rebooting. my question is before i go out and buy another piece of equipment i might not need has any one else ever experienced anything similar to this.

pull the battery out and try it with AC power only
is it maybe overheating?
Bad psu or adapter? - adapter is cheap (less than £50) so start there maybe?

sorry should of said that i removed the battery and thats the only time it will stay on when i reinsert the battery the laptop shut off, thats why i think the ac adapter might be bad, it might not be able to charge the battery. the light on the charger is still lighting up though.

if its not the AC adapter it could be the PSU inside the laptop, if its a fairly standard AC adapter then you should be able to get it cheap, else if its the internal PSU it may cost more than the laptop to fix.

forgive me for my ignorance but isn't the power supply part of the motherboard, when i plug in the ac adapter its attached to the motherboard. if not where would i look for it and what would it look like.

i didnt notice that before you said you got a new motherboard. it cant be a broken PSU then as its usually soldered onto the motherboard and so would have been replaced

try and get a new AC charger cable and see if it works

yea and after we installed it it did the same exact thing as before, i think it the ac adapter only because i do get power, the display is lighting up but its real dim and it stops loading at the HP logo, think i might make a stop at the local pc store and buy a universal power supply for it and try that. but if you have any other suggestions please feel free to offer them, i have no problem opening the laptop to trouble shoot

yes, try a new power adapter as its the cheap fix and its quick

yea i think i'm gonna get this adapter http://www.bestbuy.com/site/olspage....=1083712938934

the targus web site says it is compatible with my model

$83.99? - targus are a good brand though, got one like that for a thinkpad of mine. How much is that in pounds sterling?