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Late 15 iMac 27" 5K 820-00134 No video post SSD upgrade
System running great. Upgraded SSD and it boots but no video/screen. Tested 5K Panel on another iMac and it works. Tested with a known good 5K screen results same. I also tested video cables screen to board and no help. Is there a way to test the connector on the logic board to determine...- KMCC
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- Replies: 3
- Forum: Macbook Logic Board Repair Questions
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iMac 2017 27" 820-00609 BIOS Chip replacement
As I was getting prepared to replace the BIOS chip I noticed a SMD near the BIOS chip that looks different. I do not have schematics or boardview. If anyone has info on the component I drew a line to could you describe it or marking ID but also the see the component is bad or not. Thank you.- KMCC
- Thread
- Replies: 1
- Forum: Macbook Logic Board Repair Questions
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2017 iMac 27" LED 1 2 3 on, LED 4 dim and black screen
LED 1 2 and 3 on, chime good, LED 4 seems dim, black screen. Using ext. Cinema via TB2 and boot the cinema seems to get bright but nothing. Tried SMC, PRAM resets, and removed coin battery, still no change. no evidence of liquid damage or physical damage on the board. PS visual looks good to...- KMCC
- Thread
- Replies: 17
- Forum: Macbook Logic Board Repair Questions