Good day

Msi gtx 1080ti trio missing 1.8volt on bios chip mx25U3340E. When i test the card. Only 12volt on pcie power cables and pcie slot and 3.3volt and 5volts are present.

I checked with multimeter and the bios chip has 0 volts on all pins. The card has no short. Removed the bios chip still missing 1.8volt.

Any help is much appreciated

Thanks

проверьте U4, она выдает 1,8 вольт. 6 пин - енейбл

this is the card, U4 is empty,. there is no chip,. empty pads

https://www.guru3d.com/articles-pages/m ... iew,4.html

Смотрите U2

Hi

Changed U2. No voltage. U2 getting 19v VIN but no output. Changed with a working one. No change.

Проверьте сопротивление на дросселе.
Сигнал енейбл и питание на шим.
Откуда там 19 вольт?!

Sorry.. 19v = 12v

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Posted after 1 hour 18 minutes 43 seconds:
12v present on all 12v rails.
5v present.
3.3v present

Memory vrm coil 65ohms
Gpu vrm coil 100miliohms(seems normal for a 1080ti..? Should be 200miliohms))

Bios chip pin8 470ohms
Coil U2 470 ohms

The rest of the coils are also wirhin normal ohms.

На 8 контакте микросхемы BIOS сопротивление должно быть больше, около 900 Ом.

Hi.

Thanks for all help. There was a missing capacitor on SS(SOFT START to Ground) on Z1267qi1. I do not know how was this missing. I soldered one according to z1267qi1 datasheet and the card start to work.

https://www.linkpicture.com/q/20210116_174010.jpg

Cheers