The internet is full of reports about succesful DIY fixes of Nvidia graphics cards using the technique: this is one more such report.
The basic recipe is to bake the card after removing all the stickers, heat spreaders, thermal pads and thermal grease and then put the card for 8 minutes in the oven already heated to 200C/385F.
I did it and I transformed the paperweight that my cousin kindly gave me (artifacts at low resolution and no display at all when going over 800×600) into a running notebook.
Until the fix works I’m a happy owner of an Inspiron 9400: Intel T2500 (2Ghz dual core 32bit), 2GB of ram, 160 GB of HDD, 17″ 1920×1200, DVD burner, 2.1 built in audio, ABG wifi, BT 2.0+EDR.
After a couple of years the card went south again.
I did find a lot of dust clogging the heatsink and this might have played a role.
I will give a try at a second run.