No signal input with HD 3850 AGP

Synesthesia · 12-05-2008, 05:27 PM

I think I may have caused a surge in the power supply by placing my CPU with previously bent pins back into the socket. When I turn on the computer I get a "No signal input" message, although the HD 3850 fan is spinning. After clearing CMOS, the first boot will bring computer all the way to Windows desktop with no display. I know this, because I hear the Windows sound. After restart, it won't even do that. My x850 Pro works fine. The CPU uses 20-30% if I continuously twitch the mouse back and forth across the screen while holding a window. I don't know whether that is normal or not.

Before bending the CPU pins, I did have problems initially installing the HD 3850. No image would display. I had fixed this with the following steps: turn off computer, turn off power supply, unplug power cable, turn everything back on, wait for screen that gives option to continue, press F1, restart immediately (guessing probably as the DMI pool was building). Then, the screen would finally display and everything worked properly. I could run high-end games for hours with no problems. I would have to do this everytime I disconnected my computer from power.

I think the CPU pins are the only factor that has changed since the computer was working and that leads me to believe it is a power supply problem. Otherwise, it might be a problem with my BIOS, monitor, VGA-DVI adapter, etc. The HD 3850 requires an 8-pin molex adapter that I've connected 2x4-pin wires to. Is it possible that I've connected the wrong combination of wires? My power supply is rated 33A on the +12V rail. My BIOS reads the CPU Vcore @ 1.32V, voltage battery @ 3.15V, 3.3V rail @ 3.26V, 5V rail @ 5.08V, and +12V @ 12.21V. What is a 12V rail? Is it a 4-pin molex wire or the four 4-pin molex wires with 8 molex connectors that come out of my power supply?

I've looked into this power supply: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

Is it compatible with my system?

Please help me solve this problem.

Specs:

OS: Windows XP Professional 32-bit SP3

Motherboard: ECS KV2Lite / K8T800 Pro / socket 939 / AGP / PC3200

Video Card: ATI HD 3850 AGP / ATI X850 Pro AGP

Power Supply: Enermax EG465P-VE ATX12V Ver. 1.2 460W

Processor: AMD Athlon X2 3800+

Monitor: old generic CRT monitor

12-05-2008, 05:27 PM	#1 (permalink)
Synesthesia Registered User Join Date: Dec 2008 Posts: 1 OS: XP Pro 32-bit SP3	No signal input with HD 3850 AGP I think I may have caused a surge in the power supply by placing my CPU with previously bent pins back into the socket. When I turn on the computer I get a "No signal input" message, although the HD 3850 fan is spinning. After clearing CMOS, the first boot will bring computer all the way to Windows desktop with no display. I know this, because I hear the Windows sound. After restart, it won't even do that. My x850 Pro works fine. The CPU uses 20-30% if I continuously twitch the mouse back and forth across the screen while holding a window. I don't know whether that is normal or not. Before bending the CPU pins, I did have problems initially installing the HD 3850. No image would display. I had fixed this with the following steps: turn off computer, turn off power supply, unplug power cable, turn everything back on, wait for screen that gives option to continue, press F1, restart immediately (guessing probably as the DMI pool was building). Then, the screen would finally display and everything worked properly. I could run high-end games for hours with no problems. I would have to do this everytime I disconnected my computer from power. I think the CPU pins are the only factor that has changed since the computer was working and that leads me to believe it is a power supply problem. Otherwise, it might be a problem with my BIOS, monitor, VGA-DVI adapter, etc. The HD 3850 requires an 8-pin molex adapter that I've connected 2x4-pin wires to. Is it possible that I've connected the wrong combination of wires? My power supply is rated 33A on the +12V rail. My BIOS reads the CPU Vcore @ 1.32V, voltage battery @ 3.15V, 3.3V rail @ 3.26V, 5V rail @ 5.08V, and +12V @ 12.21V. What is a 12V rail? Is it a 4-pin molex wire or the four 4-pin molex wires with 8 molex connectors that come out of my power supply? I've looked into this power supply: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006 Is it compatible with my system? Please help me solve this problem. Specs: OS: Windows XP Professional 32-bit SP3 Motherboard: ECS KV2Lite / K8T800 Pro / socket 939 / AGP / PC3200 Video Card: ATI HD 3850 AGP / ATI X850 Pro AGP Power Supply: Enermax EG465P-VE ATX12V Ver. 1.2 460W Processor: AMD Athlon X2 3800+ Monitor: old generic CRT monitor