Recent content by Salvatore951

i am using TL866, but it doesn't detect memory model and it reads a blank file. I tried all position, pin with a small circle in the corner should be pin 1. Please can someone explain me how to flash rom with this video card, I have no experience with Gpu rom.

imac 27 late 2013 shut down after few hours ( sometimes after 3 hours, other times after 30 minutes ) and doesn't turn on. To turn it on again, i have to unplug power cable for at least 30 minutes. When it shut down, If I don’t unplug power cable and plug it again, it doesn’t turn on. Have you...

how can I update rom with this gpu? Can someone explain me procedure, please?

Good morning, I need to know which resistor I have to change to replace 084 chip with 005 chip on 820-2915 (late 2011 2.4ghz) with Hynx vram. Could someone post a complete list of resistor configuration for 1286 and a1297 for 6750 and 6770 with samsung and hynx vram? On my board there is only...

MacBook Pro 15 820-2850 vertical red lines when it uses intregrated GPU, dedicated gpu works perfectly. What could be the cause? is more probably mux or failing intel gpu?

I fixed by replacing lcd and clearing pads under u9300, probably Chinese refurbished lcd screen is not good quality as original one and caused artifacts or no signal.

obviously I already tried woking display but no changes. There is no ppvcore_GPU, I can't get video without vcore. Could you help me to diagnose Gpu vcore problem?

customer send me this picture that show initial problem, now I revived it it has no video.

820-3787 MacBook Pro 15 no liquid damage, PPVCORE_GPU is about 60mv, I replaced u9300 but no changes. Macbook boots os fine, keyboard backlight turns and I can hear OS sound, but there is no backlight and no video. GPUVCORE_EN is 3.25v GPUVCORE_PGOOD is 3.2v

820-3437 early 2014 no fan spin, green and orange light, no liquid damage, u6100 looks a bit corroded but I can't see broken trace. all g3hot rails are prensent PP5V_S5 present PP5V_S4RS3 0v PP3V3_S5 present PP3V3_S4 0v PP3V3_SUS 0v SPI_CSO_L stable 50mv PM_SLP_SUS_L 0v Owner used a not...

i reflowed SMC and now it works. My question now is? Is reflow of SMC a temporary fix like gpu Or is SMC a real solder problem?

I replaced the gpu in 820-2915, I tested many hours with valley benchmark, shipped it back to customer. Customer went to Apple Store to mount HDD and then called me the same day because macbook doesn't turn on. I received macbook back: No visible damage on the board, if I try to turn it on...

Could someone help me, please?

I received a Mac mini 2009 that chime but It only show white screen. Plug in an external hdd I can see that I neither try read the hdd or load the os, it's like it stucks after chime, even if I press ALT nothing show on screen. I tried to change ram, installed another bios, changed lcd cable...

thanks you duke