Radeon 9800pro shows swapped characters in text mode \ VOGONS

Radeon 9800pro shows swapped characters in text mode

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First post, by douglar

Posted on 2025-08-30, 23:48

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Seems to run fine in 2d windows, but in Dos, the characters look like they were run through a replacement cypher.

The attachment Photo Aug 29 2025, 6 46 50 PM.jpeg is no longer available

It was missing an inductor and I replaced it. Should I redo the inductor or does this look like something else?

The card did crash on me after running quake 2 for 2 minutes.

Reply 1 of 5, by pixel_workbench

Posted on 2025-08-31, 00:18

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That is usually a symptom of memory corruption. Either a bad memory chip or a broken connection to one or more pins on the chip.

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Reply 2 of 5, by douglar

Posted on 2025-08-31, 01:41

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pixel_workbench wrote on 2025-08-31, 00:18:

That is usually a symptom of memory corruption. Either a bad memory chip or a broken connection to one or more pins on the chip.

Ooof! That’s a toughy with BGA memory chips.

Reply 3 of 5, by tehsiggi

Posted on 2025-08-31, 07:05

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See the repair thread in my signature. That's very certain a memory issue. You can run R3MEMID to identify the faulty channel and then see if there is something wrong / damaged on the board.

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Reply 4 of 5, by douglar

Posted on 2025-08-31, 13:46

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tehsiggi wrote on 2025-08-31, 07:05:

See the repair thread in my signature. That's very certain a memory issue. You can run R3MEMID to identify the faulty channel and then see if there is something wrong / damaged on the board.

Thanks, you make it look possible

Reply 5 of 5, by tehsiggi

Posted on 2025-08-31, 14:32

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At least the diagnosis is relatively straight forward. That'll give you an idea what you'll need to do in the end. Does the pattern change if you press on any of the memory chips?

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