HP 530 Dead

[Monument]

Hello people of Badcaps forum ,im new user here and want to share my problem.
Recently i bought laptop HP 530 from a friend. First the laptop had GPU problem.
Then i resoldered GPU and NB,still nothing. Friend accidentally had short circuited the laptop from battery connector. (friend sayd he tryed to turn it on using broken powerjack ,so he took "ground" and "positive" wires and tried to put them on battery connector.) I took the mobo apart ,and saw burned transistor (NC 3 legs),it was located near the battery connector.
I took new 3 leg transistor from DV6000 mobo and replaced it with burned one , still nothing.
The lappy is complete dead as it was . No lights at all. When battery had some power then yellow led blinked. But as soon as it ran complete off ,it stopped even blinking . When i connect charger with laptop it doesnt even start to charge the battery.
Where and how can i find the faulty microchip/transistor?

Kaur.

[digge]

Re: HP 530 Dead

Hi, and welcome to the forum.

First thing to do is to take good pictures of the pcb. That will aid ppl that isnt familiar with that particular model in helping you.

[mattbrad2]

Re: HP 530 Dead

Typically, shorts from the charge side especially, will burn out your power controller. It's usually a Maxim IC but on some they use Texas Instruments. At this point however, you probably are better off replacing the motherboard all-together. If the power controller is shot, then you could also have shorts on the standby voltage rail - which are an absolute PITA to find. I'm curious how you "resoldered" the GPU. Did you reflow it or replace the GPU? If you replaced it, you could also have a short on the underside. I stopped doing reballs for this reason - just wasn't worth the hassle.

[Monument]

Re: HP 530 Dead

I am sorry that i was away for some time . I sold the laptop to a friend of mine ( hes an old man,repairs laptops etc). 2 hours after i sold my laptop he called and sayd "Thank you , i repaired the laptop". The problem was , there were 1 IC controller (8-leads) and 1 resistor burnt near power connector. Still ,the reflow i did for GPU and NB helped , cause now he managed to get into windows (which i assume that pc reqonized the GPU). I have many things to learn about repairing a motherboard (on chip level).

I am sorry about my faulty english skill ,im from Estonia. And Thanks for the answers you can close this thread.