Hi

There is a notebook (LA-4221p) which is turning on and fan spins but there is no Display, I have checked the following.

Current Consumption is 0.8A
PLT_RST# -> 3.3v
H_RESET# -> 1.05v (CPU C1 Pin - Measured without CPU)
H_PWRGOOD -> 1.05v (CPU D6 Pin - Measured without CPU)
GMCH_ENVDD -> 0v (without LCD Connected)
+LCDVDD -> 0v (without LCD Connected)

After switching the motherboard on it doesn't read BIOS, there is clock available on BIOS chip (U17) but some strange signal present on SI SO pins.

any help will be appreciated, thanks.