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Hi guys Got a 2015 MBP 820-000138-A board in. Had liquid damage (vinegarette!) to the LVDS area. Cleaned all the junk off, replaced all of the caps next to the LVDS as they were falling off (!) and replaced the LVDS connector itself. Getting no display on LCD (external display is fine) and no...

Cleaning the board (removed the Q7700 IC and cleaned / resoldered), and the backlight driver, all seems well now with an instant backlight response rather than the delayed response I was getting before. However, wasn't aware of the Magsafe 1->2 adapter issue - will lodge that in the memory...

Can't delete my post so I'll update - there IS liquid damage, didn't see the tiny spot of corrosion right underneath the backlight controller, will sort that and post back if there's still a problem! Cheers!

Hi guys Got an A1502 here that has a backlight issue. No sign of any liquid damage on the board, all seems clean. The screen has a display, but the backlight is intermittent. By that I mean that sometimes it will boot normally, screen will light, all is good. Sometimes however it won't light...

Alan.L - my apologies, I'm so used to looking for a bloody Thunderbolt port that I completely missed the HDMI port on the side! (In my defence, I'm on holiday from today so not really been thinking straight!). A perfect picture with HDMI - so panel it is (or certainly should be!). Please...

Thanks G.Beard I've attached a photo of the screen - I reckon it's an LCD problem to be honest but the method of (reported!) failure doesn't really match up - although as Louis says - "People lie"!

Hi all, Got a Mid 2015 MBP here with the 820-00138-A board which has presented with a corrupted screen. Mac will boot, chime and the screen will fade to green with a fairly solid white line running down through it. It IS a Retina model, I've had similar issues with the 13" screens when...

Absolutely on the money as always Dukefawks, the cap was shorting to ground on the PP3V3_S5_AVREF_SMC line pulling it down, repaired the tracks, replaced the cap and U5010, then had 3.3v back again where it should be and all is well. Please mark as solved, and many thanks!

Hi dukefawks Thank you for the reply. I had reached the same suspicion, was poring over the schematic last night and scouring Google and you'd suggested the same on another post elsewhere. I assumed that the SMC must have a reference voltage to compare to, I just didn't know which one it was...

Been prodding around the board again today. Had a look at the original IC0R circuit. Removed the U5400, cleaned the pads and resoldered it - now Pin 6 is around 0.18v (better). However, the ASD still fails on all 7 sensors above, and the values are MILES away from the upper limit. IPBR for...

Some more information from the EFI test hardware profile: IO0R - lower limit 0.2A high limit 1.0A, reading 10.996A IPBR - lower limit 0.1A high limit 1.0A reading 9.165A ISDC - lower limit 0.0A high limit 0.8A reading 5.078A VC2C - lower limit 0.6v high limit 1.0v reading 3.298v VP0R - lower...

OK - so an update! Having run the proper EFI diagnostics, I've got some more sensor failures... Sensor - Current (IC0R) - reading above high limit Sensor - Current (IM0C) - reading above high limit Sensor - Current (IO0R) - reading above high limit Sensor - Voltage (VC0C) - reading above high...

Ah OK, fair enough! I've just discovered (or been told) that the built in ASD stops on the first error, big mistake on my part as I assumed (you know what they say about assumption!) that it would give me a report that was accurate, should know better with Apple really... Needless to say...

Thank you for the reply 2informaticos You've just answered my next question, I had been looking at those values on the schematic and wasn't quite sure how to interpret them! I'm fairly sure that the soldering isn't an issue, although I'm the first to admit that I'm not an expert, I'll check...

Hi guys, long term lurker, first time poster / subscriber here! I've got a Macbook 2013 Retina here (820-3462) that presents with a laggy trackpad and slow operation, kernel task up at 700% etc. Board was very clean, very small amount of liquid ingress (possibly coffee on one of the Poly caps...