I suspect your card probably has a seized fan, and the GPU chip dies as as result.
At least this was a very common issue that I saw back in the day with these cards. Same with the Radeon 9700.
... which is a shame, because if it wasn't for the crappy / undersized coolers that these cards used, many of them would still be working today.
Fun fact: one of my very first/oldest GPU repairs was on several Radeon 9700 video cards I bought off of eBay in the mid-late 2000's. Many had missing SMD components. I fixed those, thinking this would restore the no video / artifacts on these. But of course that wasn't their issue. It was the GPU going bad. Eventually (early 2010's) I gave these a reflow using a heatgun, and I was able to bring about half (four) of them back to life. One died after a year of use, because I used the same crappy stock cooler. The other 3 I modded heavily with large CPU and GPU heatsinks off of Xbox 360's, and they are still working today. Granted I never put too much use on them since I fixed them... but on one of them, I did use every once in a while.
So there is some hope for yours too, most likely to come back with a reflow. Of course, inspect for broken / chipped SMD components first. If none, it's probably a GPU issue and I'd say there's a 50% chance you can get it back running.
... Or if you chose not to mess with it, don't throw it away! Either put it for sale online or give it away locally, if possible. The retro PC community has picked up just about everywhere globally (though certainly more in some places of the world than others.) As such, there is a chance that there may be someone nearby willing to buy/take that non-working card and try to fix it.
