DV 5000 came dead. After changing one short cpu core fet : fds 6294. Lap fires up, with lights, fan, but no display.

Current reading stops at 0.7A with DDR and without DDR same. i guess no detection of DDR.

Found :
RAS and CAS at DDR slot measured 0.4V (low), sometimes floating to 0.79V and up to 1V.
VTT at net resistors, sometimes OV (fail), others 1.5V (normal).

I guess I have to reflow net resistors for VTT and Ati BGA RAS and CAS correct voltages ! Or any other suggestion is welcome ?

Also found :
at LVDS connector :
+LCDVDD = 0V (3V normal) consequence of ENVDD=0V issued from ATI RS480M_BGA706 to Q7 base
ENABLT = 0V instead of 2 to 3V issued from RS480M to KB910 consequence of INVT_PWM = 0V (output of KB910)
BKOFF = 0V
DAC_BRIG = 0V
DISPOFF#=0V

I will appreciate any urgent suggestion about next steps to be taken.

Thank you

see joined snapshots files.

New attachments : 3 files.