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Also: J900 (pin 4) on the LVDS connector shows 27.5V..

Yes, sorry Duke.. The C9010: I get 27.5V..

No Title U9000 Pin: 4 & 5 (Shows 0v).. Should be 3.4v. I think the IC is broken? On the otherside of the IC, i get correct volt.

CORRECT MOTHERBOARD NR: 820-2879 820-2879 - No backlight on LCD... Where should I start to measure? 1. Computer starts up. I have fan spin and chime. But no image! The screen is black, no apple logo when using light on the screen. 2. I have 12,6v on F9800 (for PPBUS_S0_LCDBKLT. 3. R9715 shows...

yes, make it easy.. DONT DELAY, buy today :)

Thanks. Im going to check exactly what u described and get back to you here shortly.. meantime.. Do you know if this Backlightdriver works for this motherboard? https://www.mouser.se/ProductDetail/Texas-Instruments/LP8550TLX-NOPB?qs=sGAEpiMZZMsE420DPIasPlogyTiw5Lxrbcr5vzVG7Qo%3d

There is continuity between pin 2 of l8304 and the capacitor right below it... :)

Yes, there is Continity now.. :) between pin 2 of l8304 and the capacitor right below it. But no light still..

Pin 18/19 shows now 3.3v both och them(with screen). Even L830 shows 3.3v.. But no logo, no light on screen still.. ?

Thats farenheit right, not celcius..? I have 450 celcius on mine.

How much heat do u recommend for the Solder iron? celcius?

Ok, roger that.. Gonna check it now.. ..

What about U8300...? Could that be a problem?

- LVDS connector Pin 18/19 i get on both 000.2v (schematic says should be 3.3v) (in continuity mode I get: OL. on both pins 18/19. NO BEEP! - pin 2 of L830: I get NO beep in continuity mode. and voltage I get the same 000.2v - pin 1 of L830: also shows 000.2v and NO beep!

Ok, im going to chekc it now. hold on pls. thx

I checked. Still NO light on screen or image. 1. Could it be the bad Diode(D7701) since its measuring 0v..? Its should measure 0v right, since its a diode.. :) Im stupid sometimes.. 2. Could it be the reflow not properly done? I can feel we are several step closer though to get it working...

- R7704 measures correct: 33 ohm - D7701 measures: 0v on both sides. DMM basically goes down slowly to 0v.. Must be the zener diode 7701 then?

Ok. will check that now: "make sure r7704 is measuring good too and check voltage on both pins of d7701"

Ok, so now i have reflow the LED driver(U7701).. Now what I do?

Thanks u for helping me out really.. im very greatful.. Love to fix my first board.. Im going to stay on this thread until we have solved this board.. Will be my first.. hope thats ok with you? Ive checked pin 5, the ball is still there under when lookin in the microscope. but its hard to...