Hp DV6 motherboard DAUT1AMB6E0 power on then shut off.

This motherboard has a not usually fault, if powered on and motherboard is cool it starts and fully working, if you restart PC after 5/10 min. it shut off, if you try to restart it shut off again.
I only checked PQ41, when PC starts it begins very hot (you can't touch it with a finger), if PC starts and O.S. is ok PC works and PQ41 is cool.

Measure resistance to ground on PL7

PL7= 200 ohm

The voltage on PL7 (1.2v) is present?
measure the voltage on pin 4 of PU1

PL7= 1,2V starting motherboard

Pin 4 = 3,3V starting motherboard

correct values
For safety, replace PQ41 (hot).
Check the resistance of PL7
with red lead to ground and black lead to ground.

Ok thanks, I will check.
Today motherboard starts and restarts without any problem, PQ41 and PQ42 always became hot when motherboard starts up, but PC doesn't shut off yet.
Mistery!!!!

-- 24 April 2014 --

Red on PL7 to ground=160ohm
Black on PL7 to ground= 180ohm

-- 24 April 2014 --

Today motherboard was on for many hours without any problem, then I shut off, when I try to restart it, motherboard starts and shut off, so this is an only start problem.

Program the bios

Bios reflashed same problem
Replacing chip bios same problem
Replacing PQ41 SOLVED!!!!

Thanks.