Dear TechSpot Community, Computer Spec: N2U-400A Athlon 2600XP Barton 1GB OCZ PC3200 (Optimal Setting) (166 FSB) Antec 350 Power Supply I would like your help/advice on solving the following problem. I had recently installed a ATI-Powered Radeon 9800 Pro 128mb, which took about an hour to install because the motherboard (N2U-400A) kept on beeping or the LCD would just give me a No Display message: the Radeon 9800 Pro worked fine and I used it for 2 hours but I decided to return it since one of the screw/joint was missing for connecting a CRT display. So, I removed it and replaced it with my old GeForce 5200 FX 128mb Gainward which had been used since I had built my computer (above configuration). However, the motherboard would keep beeping and the LCD shows no display when I boot my computer. I did reset my CMOS but I can not even get to the BIOS menu. I would like to know what the problem is and how I can solve it. Please let me know if you need more information. Thank you.