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Hi, i just want to know if there are schematics accessible for iMac and also one processing to find if the problem was on the graphic chip. I can reball the gpu if it is the problem. This iMac just dead instantly no sign of graphic problem before

hi, I found this values on U6990 1 : 0,4v 2 : 16,3v 3 : 3,06v 6 : 1,2v 7 : 2,3v 8 : 1,2v 10 : 0,6v any idea ? :-) please

we have a board with U6201 dead. some burning traces are on pins 38 and 39. lost DZ6704 and DZ6705 I repair the area and change the two DZ and I changed and repair the area of the U6201. Now we have sound (chime) on the boot and immediately a "crash sound" after the chime like a disconnection...

When I plug the power cable there are curent on ppbus g3h and the 3v42 was also here. but the green light not be there ? I change the u6900 but no change. The 3v42 (3v39 in real) was on the u6900 but the green light don't turn on . Why ?? please to help me :-)

Hi, on this board there are a GPU VCORE = 1.13v but on the schematics there marked 0.9v max Vout = 0.75V - 0.90V Does any one can help me to know if there are one problem here . thanks a lot

Hi all, i am French so sorry for my English. :-( on this board I have PPVCORE_S0_CPU at 0,9v no 1.1v also 0,9v on PPVCORE_GPU ??? PPVIN_S5_HS_COMPUTING_ISNS 12.6v ??? I hopes the CPU is not dead but what we can test or mesure. I am not an expert