internal PSU on laptop failed

unhappyvirgincustomer_2

Hi

Need some advice.

My laptop went wrong recently as it stopped charging and I checked to see if it was the battery or external power supply by removing the battery and trying to turn it on which it wouldn't so presumed the external power supply had failed. I bought a new one which didn't fix the problem so a friend of my partner agreed to have a look at it and now says the internal PSU has failed.

I am suspicious whether it really has failed as surely if it had failed the laptop would not have turned on and would have just turned off as soon as that happened would it not?
I don't really trust him and think he may be trying to rip me off as the laptop repair company who rent the upstairs offices from her dad's office said it is most likely the connection from the power socket to the motherboard needs resoldering but they will charge just to look at it.

posted_2

Modern laptops don't have an internal psu, the transformer is in the brick on the power lead. Most likely candidate is the connector on the motherboard.

BillTrac

posted is correct. Laptops dont have the space for internal an psu, that is why you have to put up with the external brick.

My old Toshiba had a problem similar to this and it turned out to be the actual lead from the brick to the laptop had a broken core. New lead fixed the problem. Other laptops have had problems with the connector on the rear of the laptop (some are on the side )you plug the lead into coming away from the pcb. Not common but does happen.

unhappyvirgincustomer_2

Hi,

Thats exactly what I thought that the PSU was the brick, I have replaced that and it still didn't work so I think the problem is the connection to the motherboard which may be able to be soldered?

totalsolutions

Yep a simple soldering job. But you have to keeptaking things out to get to the connection points

unhappyvirgincustomer_2

Thanks, my girlfriends spoke to the guy who looked at it last night and he admitted that he had not even looked in it and just said he assumed that it was either the connection to the motherboard (That is what he meant as he is autistic and finds it difficult to describe things sometimes) or the external PSU. It is going to a laptop repair company above her dads offices and they said they can fix it if needs soldering or will tell me exactly what is wrong.

TimothyEBaldwin

The phrase "internal PSU" could refer to a voltage regulator or the battery charger - but this wouldn't prevent charging and running on external power whilst allowing the laptop to run on battery power.

macman

Why not check whether the original mains adaptor is outputting the voltage it should be?-this is 1 minute's work with a multimeter.
But if the replacement doesn't work either, then most likely to be the charging socket (probably about £100 to fix) or (worst case) mobo failure.