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WHoop! Thanks dude, Tried different RAM and got chime and backlight, Put the Tiresias back on and boom! Thanks bro, x

I get .. fan spin No image no chime no backlight Tried with Tiresias present and not present same result

This is still giving me shit! but just clocked this board is a 820-2914-B not -A Would this be a different bios?

aHH PERFECT! Got this set up now, But either I fked something up or the bios I got from Badcaps was crap. Would you have a bios file I can try? It not dosent chime or backlight just fan spin,,,

Iv'e got an 820-2914 here , It had a dead GPu and a damaged LCD connector, I replaced the LCD connector and added a Tiresias , I'm now getting boot up fan spins, chime and backlight, as the one in this thread above so grabbed my Medusa and realized I don't have a donor with known good bios I...

well bugger me! It was a (New) Battery causing the problem,brand new only 2 cycles,, I swapped this bat with one from a working machine and the problem jumped from this mac to the perfectly good one I swapped batteries with! Ive never seen this before, is it a faulty battery should I return...

I have this a1286 that had the graphics issue, I installed a Tiresias and all works great, Problem is after a couple of reboots or just randomly when turning it on the machine runs really really slow with like a crazy lag on the trackpad curser and it taking an age to respond to any kind of...

"feel like a right nob now!" Sorry, I thorght I was to always to take readings on the bench unless stated otherwise, Just looking at the schematic, I have a question, can a 0 ohm resistor be replaced with a jumper wire? I can't see why not? I really struggle replacing some of these tiny...

I'm away from the desk now but was just browsing older posts on this forum and found a similar thread from 2016 where it was stated that it makes a difference if the lcd ribbon connector is inserted or not. I was currently testing on the bench. Do I need to have the screen plugged in to get 3v...

2/3 J9000 = 0v L9004 =0v U9000, pins 2/3 =3.3v Pin 1 power enable= 0v Pins 4/5 =0v

Ahhh nuts! Spent the time rebuilding this today to give it back, put the entire machine back together, one last boot to test and... White screen.. Nothing else, External monitor it boots perfect into os, internal display just shows a bright white screen, Spent ages going over the board under...

While checking the above I spot the giant "P" under the scope,,,,, FFS!!!! F9700 backllight fuse!!!!! Sure as shit its dead! replaced and it's all working perfectly! Thank you for getting me to another fix and sorry for wasting your time on this one . I should have spotted that out of the...

I traced pins 2/3 all the way back to U9000 = 0v

pins 4, 6, 7 = all at 3.28v L9008 looks good at 0 ohm also R9008/9 look good both reading 2.17k I did notice that from the boardview to my actual logic board I dont appear to have c9015 present on the board, Either it was never there or I have knocked it off without noticing until now but...

This had liquid damage, small amount and some corrosion to J9000, I replaced j9000, machine now starts up, fan spin, I get flashing folder when connecting external display but nothing when using internal display, tried a second know good screen to be sure, Soldering to j9000 checked all pins...

I've noticed recently that I'm really struggling with my solder tip and solder working on these tiny micro sized components.. Any recommendations on what solder or tips to use would be much appreciated!

" I was thinking you've already tried RAM " I had dude, and mentioned it in my original post, I had put back the original ram that was in the machine when tested and working,,, No idea what caused the issue or why it wouldn't boot again with the original HDD or ram, But after much fkin about...

Sorry for my ignorance, what is ASD? Also, you can put this one down as fixed, I just sat and tried several different ram sticks one after the other as it was bothering me so much that it was working and I hadn't even touched the logic board only to replace ram and ssd the 7th stick of ram I...

Yes! Re installed it and now it's installing Catalina.. Will add brightness jumper wires after all is good from os install :)

I have both a windows and Ubuntu SSD, I tried both in this machine and they both behave the same, They boot ok and work for a few minutes fine, then the machine just freezes and is non responsive and I have to reboot. This is crazy as the mac seemed fine when briefly testing this morning...