As far as I understand, R394 sets up the threshhold, that could be some workaround.

Hi,

I need help finding the thermistor/sensor responsible for ambient temp. detection in E7440. The laptop randomly powers off with thermal event "ambient thermal sensor -148*C". I have schematics and board view but unable to determine which component is responsible for sensing the ambient temp. I simlpy don't understand how it work from the schematic below:
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Re: Graphics card Schematics and Boardviews

MSI R9 390 Board View, v2.3, MS-V308...

Re: MSI R9 390 Gaming 8GB - short on +MVDD

Mine is ~10 ohm on memory and the card boots up and displays. Those cards seem to be very hot, thus high chance for fried GPU

Re: 1660 super repair - not detected



Got it now , thanks for the explanation ...

Re: 1660 super repair - not detected



Is it only me seeing [b]0.07[/b] not 0.7? Or 0.07 is still ok?Re: 1660 super repair - not detected



Is it only me seeing [b]0.07[/b] not 0.7? Or 0.07 is still ok?Re: 1660 super repair - not detected



Is it only me seeing [b]0.07[/b] not 0.7? Or 0.07 is still ok?...

Re: 1660 super repair - not detected

It's .07 not .7. chips may be factory disabled, check GPU numbers most probably ends in A1.

Re: 1660 super repair - not detected

Hi,

I'm just a noob but 4,5,6 looks like dead short, the voltage is also odd. I would take off the radiator and look at the fets.

Re: MSI R9 390 Gaming 8GB - short on +MVDD

I have soldered back the GPU and memory and guess what? It WORKS!
So it looks the culprit was shorted R47 - 10k resistor... I yet do not know if all is ok as I haven't installed drivers yet and the card is artefacting on uefi screen a bit but I am happy I have managed to make it that far...
Thank you Richard for pushing me the proper way

In case I would have memory issue, does anyone have a clue on how to diagnose it on Radeon?

Re: MSI R9 390 Gaming 8GB - short on +MVDD

Hi Richard,

Many thanks for your reply and interest. It is nice to read some logical conclusions as I am easily confused with my results due to lack of knowledge



Ok, that idea came to my mind once I was poking around with it, but because I have an old, working R9 270 I measured the resistance on the memory and it is about 250 ohms. So this measurement misleaded me a bit thus I dropped the idea that it may be actually correct reading. I did not consider the fact that the 270 may have different...

Hello,

Please note I am a noob and all the actions described below are based on the experience gathered on the internet, mainly YT

MSI R9 390 Gaming 8GB - motherboard model MS-V308 v2.3.

The card has a short circuit on the entire + MVDD line, starting from the Q703 element ending with the MVREFD outputs under the GPU, but I will describe from the beginning what I did:

1. At the very start, I measured the resistances on the main power lines, coils and checked the 0 ohm resistors. Everywhere ok, hundreds/thousands of ohms on each, well except...

Re: New Members - please post your introductions here

Hello! Greetings form Poland.