Imac 27 2009 unsuccessfully flashed bootrom.
I had a working imac, but decided to flash the bootrom, first connected to different chips (the lm393 chip and the chip that is under the video card), until I found the right one.It failed to flash, because the old bootrom could not erase the flashrom. When turning on the imac, several problems were detected.
1) A total of 2 diagnostic LEDs are lit.
2) There is no sound at all, although there is no RAM in the imac.
3)The fans are spinning, the imac does not reboot.
4) For some reason, the imac began to turn on when I insert the network cable, bypassing the button.
Checked 14 pins
When the imac is turned on, 2 - 3.27v, 3 - 5.02 m, 4 - 11.9v, 9 - 3.27v, 10 - 11.8, 11 - 11.8 , the remaining pins are 0 volts.
The Lm393 chip that I wanted to flash has 2 earths on legs 2 and 7.Maybe the problem is in him?
I will be incredibly grateful for the help, first of all, I'm all thumbs when it comes to computers.Secondly, I want to learn.
I had a working imac, but decided to flash the bootrom, first connected to different chips (the lm393 chip and the chip that is under the video card), until I found the right one.It failed to flash, because the old bootrom could not erase the flashrom. When turning on the imac, several problems were detected.
1) A total of 2 diagnostic LEDs are lit.
2) There is no sound at all, although there is no RAM in the imac.
3)The fans are spinning, the imac does not reboot.
4) For some reason, the imac began to turn on when I insert the network cable, bypassing the button.
Checked 14 pins
When the imac is turned on, 2 - 3.27v, 3 - 5.02 m, 4 - 11.9v, 9 - 3.27v, 10 - 11.8, 11 - 11.8 , the remaining pins are 0 volts.
The Lm393 chip that I wanted to flash has 2 earths on legs 2 and 7.Maybe the problem is in him?
I will be incredibly grateful for the help, first of all, I'm all thumbs when it comes to computers.Secondly, I want to learn.