Need urgent assistance. My product has been performing well for the past 5 years. The video card quit working. I purchased HP replacement p/n 649668-001. Problem is that any replacement card I attempt to use does not work. Some research indicated that the BIOS for the m/b may not be compatible with the rev of the cards I’ve been trying to use. My original card has the same p/n but Rev M01. Any new cards are Rev S01. Of course, I downloaded and installed the latest BIOS file from HP website. Thanks.
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