Hi,

Fist I apologise for using english.

I have one HP DV6565EN laptop in front of me. Owner said that he left it to install windows and after some time the computer was shut. So, what I have discvored. There are some shorts on the motherboard. Firstly it was some fet near the power connector wire. 6679GM - it was shorted. I got a new one from other MB. Now the power cord's connector LED will light, motherboard does nothing, although. Also found one...PC112 (What is it anyway? Some thantalus capacitor or smt?)shorted near the CPU. Removed it and still nothing. Its is barely heardable that some ticking is on the motherboard, like a short circuit protection circuits action....when I measure voltages (for example on the gate of the fet) i see bouncing voltages, about 0 to 0.1V. One higher impulse after every second or so.

I think that there are still some short circuits I can not find and some Power IC is going to protection mode. All the voltages on the motherbard are llike that, I can not find any anything decent (1.8V, 2.5V, 3,3V or smt).


All ideas are welcome, also service manual w electrical schematics.

-Thanks,
-Eggy

huh, sorry for the confusion at the theme name. I ment it WONT SHUT ON not off...

Обидно, какихто 10 лет прошло ...

Полный текст
http://www.notebook1.ru/forma1/viewtopic.php?t=5618
А так же весьма полезно сообщить платформу Вашего аппарата
http://www.notebook1.ru/forma1/viewtopic.php?t=20185

_________________
Куда клиетна не целуй - кругом задница

Врядли снятые кондесаторы короткие, смотрите в основном керамические конденсаторы. Ежели все снятые ёмкости в к.з. врядли аппарат подьёмный.

раз 6679 поменял то за ним в догонку управляющий шимак ...
на нр nc6400 после такого пробоя вылетело питание проца и электролит около сокета в кз ушёл тем не менее после замены всего перечисленного сильно удивился когда он завёлся...



хоть на английском но общаются...

Id writings on the motherboard are:
Picture 1
Picture 2
CPU : AMD Turion 64 x2

видимо очень надо

At the moment I already have three of those dead motherboards on my table. Other two atleast powers up, for a second or so. I haven't found any dv6500 schematics, so it's quite hard to repair anything like that. Have seen some referees to maxim's chip max8774 which, as I understand, controls the generation on vital voltages for the motherboard. Still would'n like to change them "just in case" since they are quite expensive. All the help is more then welcome.

PS! On the other motherboars on the FET's gates, I talked earlier, are about
30V.

please ask some of your friends to translated your topik at Russian

it will help us to help you

sorry for my english...

Still continuing in english: So finallt the trouble was in CPU core voltage FET that was shorted. Also there were some shorted tantal capacitors shorted. Replaced those and everything works fine now.

Case closed.