820-2914-B band of colours during startup then reboot

[dukefawks]

Bad GPU as usual.

 

[Kalemaroni]

Damn. There's definitely no chance it could be anything else at all? I've seen many different symptoms of bad GPU and to see exactly the same symptom after a GPU replacement does seem like quite a coincidence don't you think?

 

[dukefawks]

No this is a bad GPU like always. If you have no way to replace these then 95% of 2914/2915 boards are unfixable for you as it is always the GPU.

 

[Kalemaroni]

Can you recommend any good sources of these chips? The last one came from AliExpress.

 

[dukefawks]

All chips on Ali are fake garbage. I think SEE on Ebay has some real ones right now, ask them.

 

[Kalemaroni]

Thank you very much

 

[Kalemaroni]

The symptoms I'm having seem to resemble the ones in this post: https://www.rossmanngroup.com/boards...pu-replacement

The glue was not removed from the memory chips on the other side of the board when the GPU was removed.

What is needed for reflowing the memory chips temperature-wise? Will I need a profile with a BGA machine or can I just blast the hot air station onto it with some flux?

 

[dukefawks]

If you have no BGA machine you have no business even touching this board. The GPU needs to be replaced to start with.

 

[Kalemaroni]

The point is, I paid somebody to replace the GPU and when the board came back it was doing exactly the same as it was when I sent it to them. So my question is: Is there something more than the GPU that could be causing the problem, i.e., the GPU RAM? But regardless of everything, is it not fair that I can ask the question: If I want to reflow the RAM, is there a specific temperature profile I need to adhere to or can I just pre-heat the board and reflow with flux as I would do any other chip?

 

[dukefawks]

What date code is the GPU that was put on there?

 

[Kalemaroni]

I don't know what the date code is. This is what's written on it:

1134
PBX093.00
216-0810084