Beep Into The Code

That is a universal beep code for no video connection detected. Reseat the video card and check your connector from the card to the LCD. This is the most likely reason for this beep code error. You may have to entirely take the card out and reinsert it back into the slot and make sure IT IS TIGHT! And also, that the little tab connector is clicked in place on the opposite end of the PCIxe x 16 slot. source

Thank you, Wu Jen, I'll follow up on these links. If the high fan solves it, then it must have been a heat issue, we'll see. source

I just bought this 97 GP1200 and the previous owner has the code set to all one letter. Once unlocked, how do you set it to something else? source

I see butt connectors in the pics, I would ditch it completely. The last thing a Rover needs is more electric crap to fail. source

Anyone you can borrow a clock from and test to see if that clocks works and displays CODE when turning on. At least if that one works you'll then know it's a duff clock for sure. source