Comments on: Dell M90 with dotty graphics

By: Ronny

Ronny — Thu, 08 Dec 2011 08:20:17 +0000

Alex, I followed your advice.
My problem started after the M90 was 4 years and 5 months. read blocks appeared, and nothing more than VGA @ 256 colors were possible, higher resolution or greater color depth gave a black image.
the same if it was the internal, or external display.
I’ve took the graphics board out of the M90, removed the heat pipe and sink.
Put it in an oven at about 200 degree C for about 10 minutes and let it cool down to room temperature in about one hour. Remounted the hear pipe and sink, and put it back into the M90.
And….. It worked as it should be.
At this moment I can’t see no problems, it is now under test.

thanks for the input

By: ninjaneer

ninjaneer — Wed, 26 Oct 2011 15:15:08 +0000

Thanks for the idea!

I’ll see how it works with the 2500M: It does get pretty hot even with basic stuff.

I can’t quite get my head around why Dell never offered a BIOS update that just cranked the fans up passing say 60′C on the CPU or GPU sensors.

By: ed

ed — Mon, 20 Jun 2011 23:06:50 +0000

How about underclocking the GPU with Coolbits/RivaTuner and verify with i8kfangui?

The FX1500M allegedly seems reliable probably because it ran in the M90 at “only” 256MHZ

Underclocking might solve the issue permanently?

PS. My M90 has not arrived yet from ebay so I cannot verify the above!

By: John Biddleston

John Biddleston — Fri, 06 May 2011 13:21:29 +0000

Hi, I use the same computer Dell M90 for 3D CAD and Product Design.

I also have the same fault. I would like to try this, but I did not know how to remove the graphics card from the aluminium block and heat-pipe assembly.

Did you put the whole card in, with heatpipes and radiator assembly. Or is there a easy way to remove? I could not find any screws and the aluminium bracket seemed very firmly fixed!

Kind regards,
John B

By: ninjaneer

ninjaneer — Wed, 19 Jan 2011 14:57:38 +0000

Congratulations Alex!

It’s nice to hear first-hand that it can be done although I’m not sure I’d have the nerve to try it.

Of course, you’ll have used your ‘spare oven’ rather than the one you cook food in, right?

By: Alex

Alex — Fri, 17 Dec 2010 10:14:27 +0000

Well for anybody else who comes across this post with the same problem;

Drumroll please

I DID manage to re-flow the solder on the board by baking it.

Stripped it down and removed the thermal plate from the top of the GPU, put it in at 200 degrees Celsius for about ten minutes and then just left the oven door open so that the card could cool for about an hour.

The Dell M90 in question is now sitting on the desk beside me working perfectly.

By: ninjaneer

ninjaneer — Tue, 08 Jun 2010 18:18:59 +0000

As far as I could glean from research on the web, it appears to be an overheating issue with the GPU RAM.

The story goes that excessive heat cracks the solder pathways between the RAM and the board. If you ascribe to that line of thought then you may not be too surprised to hear that some people heat these GPU boards up in a last-ditch attempt to re-melt the solder and re-make the circuits. I can’t really say whether that has any real probability of success and it wasn’t something we tried.

In our case, we took the soft option of acquiring a new GPU board.

By: Jay

Jay — Tue, 01 Jun 2010 11:16:06 +0000

Hi there,

Did you have any luck with your fishing trip?

I have a Dell M90, bought in 2007…and the warrenty ran out on 22nd May 2010…and hey presto, the computer has died on me last night – literally less than 2 weeks after the warrenty expired – thats a bit fishy isnt it?

I have the same screens as you describe – the windows loading screen has vertical lines in bands of 4 – a blue colour.

I doubt Dell are going to want to help out now that the warrenty is gone…

Any advice?

Kind regards
Jay