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820-2915-B GPU replacement failed.
- Thread starter MaxFix
- Start date
Good question Duke. Actually its a funny story. Random guy walks into our shop and just hands over his macbook and says:"this shit is fucked, I dont want to fix it, you can have it for spares". He had his hdd, ram and battery removed but for the rest of it, it seems to be in working condition. So I was thinking of fixing his mobo, putting ssd and new battery and reselling this shit. But now that you are telling me that Apple does it for free I will pay them a visit tomorrow! Btw, do I need a proof of purchase (receipt) or I can just say I got it from a friend or smth?
If that doesnt work out and if I would continue with my repair, where do you think I went wrong about it? To make sure same mistake doesnt happen again in the future?
Thanks.
If that doesnt work out and if I would continue with my repair, where do you think I went wrong about it? To make sure same mistake doesnt happen again in the future?
Thanks.
You don't need anything, just take it to Apple. Make sure you clean up the mess you made with flux.
I have no idea what you did wrong. If this is your first rework chances that it is successful is low. I always reball the new chips with leaded balls. You first need practice on garbage boards, not on machines that are worth 500+.
I have no idea what you did wrong. If this is your first rework chances that it is successful is low. I always reball the new chips with leaded balls. You first need practice on garbage boards, not on machines that are worth 500+.
Alright. Thanks for the tip Duke. Practice makes the master. The first two imac video card chips went brilliantly though. Maybe just a beginners luck 
You put leaded balls to make sure they all balls melt during rework process? You think there is a chance some of the non leaded balls will not melt onto the pads on the board? I had this doubt too.
Any advice on alignment technique? Or you trust your eagle eye?
You put leaded balls to make sure they all balls melt during rework process? You think there is a chance some of the non leaded balls will not melt onto the pads on the board? I had this doubt too.
Any advice on alignment technique? Or you trust your eagle eye?
I have another troublesome 2915 board with video problems. Came in with no image.
1. Diagnostics reflow. Image is back. (Should have stopped there).
2. Replaced GPU chip. Artifacts on the screen straight from start up. When Video drivers are loaded goes to white screen.
3. Reballed and repositioned GPU chip (just to be sure). Less artifacts on the screen but still white screen after loading video drivers.
4. Tried to reball GMUX but do not have the right stencil out of 222 in my universal stencil kit. STUCK. Anyone knows what stencil I can use for GMUX?
Thanks!
1. Diagnostics reflow. Image is back. (Should have stopped there).
2. Replaced GPU chip. Artifacts on the screen straight from start up. When Video drivers are loaded goes to white screen.
3. Reballed and repositioned GPU chip (just to be sure). Less artifacts on the screen but still white screen after loading video drivers.
4. Tried to reball GMUX but do not have the right stencil out of 222 in my universal stencil kit. STUCK. Anyone knows what stencil I can use for GMUX?
Thanks!