Search results

i took U8900 down, cleaned all that shit unleaded solder from the board and the IC. put new laeded solder and seems to be working great now. i let it run in Unigine 2 benchmarks and then restarted the system and its all good. one thing that concerns me is that in unigine the GPU temp is about 92...

i will only get to my shop this weekend. meanwhile i managed to install high sierra after few tries from USB. once it boots up and runs on intel gpu i can use the laptop normally, everything else seems to work. if i reboot it while the motherboard is warm, the screen will go out. if i let it...

I managed to install osx lion from internet recovery and then fully downloaded high sierra. As soon as it restarted to start the install i get no image and no backlight after the progress bar gets to 25%. Few times i got the message that the computer restarted because of a problem. It will not...

Ok so i put the board back in. Indeed a nvram reset brought the chime back. And i think you were right about the APFS issue since it does not see the high sierra usb install disk either edit. Internet recovery seems to detect both ssd and usb. I will install high sierra fresh and report back

ok i will do that. as for the missing/corrupted os its not the case just that it was installed and running on a different board same model. if i hold the options key nothing showed up. i did not make more testing on it (did not try with usb boot either), will do that in the weekend, but it was...

hello. i just got a 820-3332A board that as far as i can tell did not suffer any water damage and did not have any repair attempts (i did not inspect it very carefully) friday/saturday i will get to my shop and have a look on it. until then, i can say that it does not see the SSD at all and has...

i know what you mean. i removed it to have the board cleaned by the time the new ones will come. decided to test it to see how it behaves. i am learning while reparing. remember it's my first aproach to a macbook repair.

No Title i have removed 2 of the VRAM and the red lines dissapeared i had only some white lines but not so thick. i removed the last 2 blocks as well and now there are no lines just white screen. so i think the issue is in the VRAM or the connections between the VRAM and GPU (which can not be...

just replaced gpu. issue is still there :( did not have high hopes anyway but i have noticed something. my PP1V5R1V35_S0GPU is not 1.5V as it says in the manual. I have 1.33V edit: just saw that this model of vram works with 1.35V as well, so it should be good i guess. i have ordered the vram...

I have installed the bootcamp drivers. Everything works besides video card.I dont want to run windows on it, i just wanted to see if i can get some usefull info about the board. Just filling time until the gpu arrives. I tried mac os, ubuntu and fedora but none boots. They all hang probably...

No Title i was referring to an extreme case where the PCB is popcorned. But this guy seemed to know what U8900 was as i can see that he redid the solder joints on it with leaded solder. the only thing i can say 100% he did not reball or replace was the GPU. speaking about replacing, can...

from my pov the board looks ok despite the fact that they tempered with it pretty hard. i dont know how much these boards last in time, but until now for me it never happened that a board was completely damaged beyond repair (this ofc if i was able to trace where the problem was). some boards...

No Title yeah... i read about the fake gpu's and also saw the video Louis made. I have just finished reballing the VRAM. nothing changed. I believe that the VRAM was reballed or changed before. it was quite clean underneath but i am 90% sure they had leaded solder balls. Also, it's very obvious...

thanks for your reply dukefawks. have you seen something similar to this before? can vram be faulty as well? i also did a reflow on them but nothing changed. that's why i am thinking that they either need reballing or replacement. that is if it's not the GPU that actually needs replacing. from...

yeah i know, but some part of me expected that. you can not really find broken newer model macbooks around here that actually worth the time to fix. i managed to get two quite decent, same model so i guess its good. i consider them study material, which ofc i really hope to fix. On ps4's if the...

Hello everyone. Glad to be part of this forum. It's my first shot with macbook reapairs so please have some patience with me. I normally do playstation 4 repairs, eveything from smd rework to reballing and so on. i decided i wanted to give it a shot with macbooks as well since its a good...