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820-4924 no picture no backlight

I

ielectron

Member
coffee damaged around lcd connector

cleaned, i replaced the lcd connector, no picture no backlight but laptop works fine, there is picture on ext monitor and boots

tried another lcd, same
i removed the lcd cable from original lcd, and the cable is not damaged, so that did not damage the board only the coffee directly

i guess the board wont recognise the lcd at all, what should i measure?

j8300 pin1 is zero, sometimes 5v, sometimes zero
 
I

ielectron

Member
l8300 has 5v on it after 3 sec of connecting the charger cable, then in few seconds that goes away

does it mean it tries to recognise the lcd but cant? its doing the same thing with another lcd
 
I

ielectron

Member
smc_lid works, it is 3.3V, measured on r5250, if i move a magnet close to it voltage drops to zero, magnet moved away 3.3V comes back

now i replaced the area around lcd connectot, all component looked bad, u8300, l8300, and caps around them

same, still boots on external monitor so cpu has to be ok, ext mouse works
 
I

ielectron

Member
u8300 pin1 was tricky, seemed soldered, but it was not, i scratched the pcb and soldered it to the incoming trace, now display works but sometimes the backlight is vibrating
 
I

ielectron

Member
it was flickering on all levels, but now i took it apart to replace the keyboard, that was water damaged too, and now its not flickering, i hope it remains like that
 
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