DELL 5521 7 beeps

[menshawy]

hi all friends
dell 5521 MB la-9104p at first the mb came to me with no power and other one try to repair it but he damaged it he remove pu200, pu400 was burned
my work in it is replace pu200 and pu400 and found io 9012 shorted and replace it but no power on then replace pch then mb power on but no data and 7beebs
+VCC_GFXCORE_AXG is missing
pl600 0.9v
pl701 1.12v
pl700 00v
pl700 1.5-1.3 ohm
pl300 1.52v
pl500 1.05v
pl400 1.8v
pl800 1.00v
any help plz ?

[mcplslg123]

Re: DELL 5521 7 beeps

Flash main +ec bios first. this mb bios gets corrupt.

[menshawy]

Re: DELL 5521 7 beeps

i did it-flashed main +ec +kbc but no result
thanks

[peste]

Re: DELL 5521 7 beeps

check whether you have (B +) in jump pjp701, (+ VCC_CORE) in pl701, pq700, pq702, pq703, pu700, and short pl700.

[menshawy]

Re: DELL 5521 7 beeps

check whether you have (B +) in jump pjp701, (+ VCC_CORE) in pl701, pq700, pq702, pq703, pu700, and short pl700.

pjp701 B+ 19v ok
pl701 1.12v ok
pq700 pq702 pq703 not short and i was changed them
pl701

[peste]

Re: DELL 5521 7 beeps

do a clean me at the original bios, if you replaced pch...

[menshawy]

Re: DELL 5521 7 beeps

i have working mb ..all voltage are same
pl600 0.77v
pl701 0.9v
pl700 00v
pl700 1.9 ohm
pl300 1.52v
pl500 1.05v
pl400 1.8v
pl800 1.00v

[menshawy]

Re: DELL 5521 7 beeps

do a clean me at the original bios, if you replaced pch...

i replaced pch and try bios ic from working mb but the same problem

[mcplslg123]

Re: DELL 5521 7 beeps

Did you connected LVDS cable+screen while turning it on?? Without lvds and screen connected, gfx core will be missing. just a reminder.

[Techtiger]

Re: DELL 5521 7 beeps

for the DATA test SPI ROM UH2

[menshawy]

Re: DELL 5521 7 beeps

Did you connected LVDS cable+screen while turning it on?? Without lvds and screen connected, gfx core will be missing. just a reminder.

you are right i didn't
thanks

[menshawy]

Re: DELL 5521 7 beeps

for the DATA test SPI ROM UH2

UH2 pins 1,2,3,5,6,7,8 ...3,3v OK after power on
thanks