Hello, got iMac a1418 with 820-3482 board, after pressing power button nothing happens, all power rails inc. s5 s4 s3 good expect the s0 state, power button works, what i should be looking for?
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Re: Need help repairing imac
Watch Louis Rossmann and Paul Daniels youtube channels, they are masters on Mac repairing
https://www.youtube.com/channel/UCl2...jw_ELax4Yisf6w
https://www.youtube.com/channel/UCG5...wP55tqqWLimnAQ
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Hi guys, I need your help again.
I have this iMac from a customer that shut down during a storm along with all the other devices in the house. In particular, the router, connected via Ethernet to the iMac, caught fire.
When I removed the screen from the iMac to check the status of the LEDs, I noticed that none of them were lit. I had a perfectly compatible and working power supply, so I tried it right away, but the problem remained the same (no LEDs). With the thermal camera, I noticed only a slight warming (32 degrees) of the NCP1605BG chip on the power supply. The rest was completely... -
Hello friends,
I have this unit with no backlight on screen. After inspection i determined there is a shorted capacitor on BKL_BOOST circuit. I removed the capacitor, short is gone but backlight still not working. I found that Q9702 is not open and R9721 is only around 70kOhms but according to schematics it should be 301k. I removed the resistor and connected the gate of Q9702 directly to GND. Now i have 12v passing by the mosfet to turn on backlight IC LP8561 (U9700) but BKL_BOOST circuit is not working. I can measure only 12V there but it should be around 60V.
Can you... -
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Apple iMac A1418 LATE 2015 820-00034 051-00081 Boardview...10-22-2024, 03:39 AM
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Hi,
I have a iMac A1418 board 820-00034, the problem is when the board is cold i can get to the mac os log in for like 1 min and then start the bootloop, but is a fast bootloop sometimes i can just see the apple logo for 1 sec and keeps doing it until i un plug the power, if i try to turn on again the bootloop continues, if i let the board un plug for 15 or 20 min i can turn on again and log in on Mac os but the bootloop start again under 1 min.
I try to get to the recovery and i can, when try to install a new mac os it starts loading the usb and then start the bootloop,...10-17-2024, 02:33 AM
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