No video dislay or backlight Diagnostic LEDS 1,2 lit, LED 3 flashes

Question

iMac Intel 20" EMC 2133 and 2210

Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

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Richdave @richdave

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Postado: 23 de mai de 2011

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No video dislay or backlight Diagnostic LEDS 1,2 lit, LED 3 flashes

My Intel Mac has died! No video or back-light. I get the start up chime and the HDD sounds like it is doing something.

Diag LEDS 1 and 2 come on and LED 3 flashes momentarily.

I can load/unload CD's, and the power button seems to put system to sleep and pressing a key seems to wake it up too.

I have checked that the VGA card is not obviously damaged.

tried resetting the SMC and the PRAM to no avail (not surprised really)

Sounds like either the VGA or the Logic boards have died!

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Pontuação 1

5 comentários

Apple iMac "Core 2 Duo" 2.4 20-Inch (Early 2008) Specs

Identifiers: Early 2008 - MB323LL/A - iMac8,1 - A1224 - 2210

or the 2,66 GHz model

24 de mai de 2011 por mayer

2.4GHz - HD2400XT VGA

24 de mai de 2011 por Richdave

the VGA is Kaput! Guess this baby is destined for the scrapheap...

18 de dez de 2011 por Richdave

richdave, Here is an excellent forum on modding/hacking video chip firmware for the Mac.

18 de dez de 2011 por ABCellars

Thanks ABC Cellars.. not sure if I will find a solution there but it will be quite a few hours of interesting reading...

18 de dez de 2011 por Richdave

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Solução escolhida

mayer @mayer

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Postado: 23 de mai de 2011

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This is straight out of the book.

If LEDs 1 and 2 are

on and you heard the

startup sound, but

LED 3 is off, video

card may either be

installed incorrectly

or need replacement.

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Pontuação 4

4 comentários:

+ but not everybody has the book :-)

23 de mai de 2011 por oldturkey03

I realize that, I just didn't want richdave to think I made it up ;-)

23 de mai de 2011 por mayer

Thanks Mayer. I too have the book! I suspect that the VGA is Kaput! I'm toying with buying a non mac Mobility Radeon HD 2400 and seeing if it will work. Same form factor and I suspect the pin outs are standard. Firmware on the card is my main concern.

24 de mai de 2011 por Richdave

Well I tried an ext monitor and it too is blank... not surprised really.

27 de mai de 2011 por Richdave

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Apple iMac "Core 2 Duo" 2.4 20-Inch (Early 2008) Specs

Identifiers: Early 2008 - MB323LL/A - iMac8,1 - A1224 - 2210

or the 2,66 GHz model — mayer
the VGA is Kaput! Guess this baby is destined for the scrapheap... — Richdave
richdave, Here is an excellent forum on modding/hacking video chip firmware for the Mac. — ABCellars
Thanks ABC Cellars.. not sure if I will find a solution there but it will be quite a few hours of interesting reading... — Richdave
I realize that, I just didn't want richdave to think I made it up ;-) — mayer
Thanks Mayer. I too have the book! I suspect that the VGA is Kaput! I'm toying with buying a non mac Mobility Radeon HD 2400 and seeing if it will work. Same form factor and I suspect the pin outs are standard. Firmware on the card is my main concern. — Richdave
Well I tried an ext monitor and it too is blank... not surprised really. — Richdave

iMac Intel 20" EMC 2133 and 2210

No video dislay or backlight Diagnostic LEDS 1,2 lit, LED 3 flashes

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