Satellite A500 LA-4991P UMA Conversion Help Needed

[rawnq]

hi all , this my first post here

long story short my friend give me a dead a500 board with multi faults and without mxm graphics card
after changing EC , CPU core driver , 3.3v 5v power supply , and some work i got the board working again

so i decided to convert from discrete to UMA and start this little project , so far i managed to only reroute LVDS signals , clocks , power to use the gm450 internal graphics

still more work to CRT , HDMI but for now i tested and got stuck and i need a hand to solve this problem

with original A500 bios board draws 1.1 to 1.2 amps and then shut off after 3 second

tested with L500 bios BOARD STARTS AND STAYED ON AND POST ( CAPSLOCK WORKING ) BUT NO DISPLAY board draw 1.7 to 1.85 amps

same with L450 bios board draw 1.7 to 1.85 amps

after doing the mod i cannot decide is it a bios problem or there is something missing
i will attach all the work done with pictures , instructions and schematics

board : satellite pro A500 LA-4991P rev 1.0

thanks everyone

[rawnq]

just updating if anyone needs this mod , i managed to get a display finally it was a bios issue and some missing components after some modifying i get it to work


i will add hdmi circuits and make a tutorial for anyone needs it

[rawnq]

just updating if anyone needs this mod , i managed to get a display finally it was a bios issue and some missing components after some modifying i get it to work


i will add hdmi circuits and make a tutorial for anyone needs it