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This was a water damaged machine with damage around Thunderbird, backlight capacitors and temperature sensor chip, cleaned and reflowed those areas but now when i turn it on, it takes around 60 seconds to chime and start, sometimes fan starts spinning but nothing happens, cpu vcore voltages...

The screen was faulty as well, had replaced lvds before and it worked for few hours and started doing same thing, which led me think that problem was with logic board, checked with new screen and its working fine

i have 820-3476 that have distorted screen, i checked it under microscope and found that one pin of lvds connector was burnt, so i replaced it and it worked fine for few hours and now its back doing same thing, board have no liquid damage or whatsoever what should i check next?

Question: what is Tiresias module?? Is it same as dying light module from doslabs? I have bypassed gmux on few machines and i am looking for a way to control brightness

I have imac late 2013 that's having distorted image when os loads up, it will have normal screen with apple logo and loading bar on start up, but screen gets all fuzzy and distorted when os loads up, even on hdmi output the screen is distorted, it works fine when put in safe mode. can it be gpu...

No liquid damage or anything, when i start and press option to select hard drive, and press enter, it gets stuck and nothing happens, this is second machine with same issue i have already reflowed u8900. What next?

Don't go in bypass mode

Yes, i have tried another as well

U8080, earlier old u8080 was causing short in pp5v_s4rs3 line, i changed it and all rails from pp5v_s4rs3 to vcore started pulsing if i remove it i get stable pp5v_s4rs3, but there is no short on pp5v_s0 line

Put new bios on and checked resistors but nothing changed

It was liquid damage, been to usa before aswell

Pins 7, 3 are pulsing and so is vcore, i will check u6100 and its resistors

I haven't measured dcin, but ppbus is definitely 13 volts

All other power rails are present except ppvccgt_s0g_ph3, ph1ph2 and ppvcccpu_s0g_ph1, ph2. i have removed l7210,l7220, l7410,l7420and l7430 and diode mode measurement on cpu side is 0.002 and 0.000. is it dead cpu?

I have changed few components, and now pp5v_s4rs3 and pp5v_s0 are pulsing, and fan is repeatedly coming on and off What should be diode measurement on ppvcc_s0_cpu_ph1 and ph2?? I am getting around 0.07

Sorry, it drops to .071

Previous repair attempt board, pp5v_s0 is missing and so is pp5v_s4rs3 but as soon i remove u8080, pp5v_s4rs3 comes back, resistance to ground on 5v_s0 line is around 90k and diode mode reading is .440. this the second board with same problem And I don't know what else to do. when i pht u8080...

I reflowed gmux chip and it seems to work fine for now

Try reflowing it again with good flux

i have this board, it does not have any liquid damage and the screen will turn off if i move or flex the machine little bit, i haven't seen this problem before so don't know where to begin with. where should i start first?