HP dv5 ( intel hd graphics ) junk display

[anthonylobo1982]

hp dv5 intel dual core board
board part no : daqt6bmb6fo

HP dv5 motherboard non graphics board. i m getting junk display. i changed the display cable and screen still same problem. i re-soldered the display connector but still same. i tried to trace lvds signals coming northbidge it is passing directly from northbridge to display connector no resistors in between. external display is working perfectly fine
i attach the pic
any more suggestions

[rajeshkumar45]

head the pch chip

[anthonylobo1982]

already done same problem

[rajeshkumar45]

whats solution u find it

[javed]

i think change pch

[avdesh12]

its gm45 mb no pch there
check for rusting near gm45 as or check gm45 track near ic

[sai]

rgb signal one is missing.....some time cip gone est protection....

[Domas]

please update progress

[aamkaachaar]

i want to know whether u see junk charactor in Starting at HP logo and bios too? Send pic at bios screen

[iamkamalrandhawa]

Hey anthony lobo. If you see hp logo have same problem during bios post then i am sure you need to reball or replace North Bridge. but make sure every track of pair of lvds signals from lvds connector to North bridge is ok. If hp logo seems ok then it might be Graphics driver problem. I hope it would help you to diagnose it. Thanks.

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