Recent content by tuner2000i

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...