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Pixilated screen :Video controller error 4V DC 1140000003

My Imac boots up intermittently to a pixilated screen, or a white screen with vertical bars, sometimes goes as far a desktop, but that is pixilated as well and freezes. The AHT shows this code: Video controller error 4V DC 1140000003. External monitor shows the same pixilation as main monitor. My Question is where the video controller is located, and if I can fix this by simply replacing the logic board. Thanks for any tips.

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Thank you Dan. I have the MXM daughter board , and I just send it of to California to get repaired. We will see how that pans out. Cheers, J

1. Apr 2018 von Jurgen

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Veröffentlicht: 1. Apr 2018

Einstellungen

Depending you your model it either uses an onboard GPU so you'll need to replace the complete logic board or you have the higher end model which uses a MXM daughter board which might be all you need.

Here's the IFIXIT guide you'll need to follow: iMac Intel 21,5" EMC 2308 Logic Board austauschen and you'll need one of these:

Intergraded Graphics:

3.06 GHz - 661-5305
3.33 GHZ - 661-5306

MXM Graphics board:

3.06 GHz - 661-5307
3.33 GHZ - 661-5420

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iMac Intel 21.5" Ende 2009

Pixilated screen :Video controller error 4V DC 1140000003

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