Tech Support Forums - TechIMO.com - View Single Post - "The mystery of the missing input signal" or "What on earth died in my computer?"

Damazzian · April 21st, 2009, 08:32 AM

I recently moved to a new apartment, and while the computer worked fine prior that, it worked less than fine when I tried to start it afterwards - this in spite of the fact that we took great care in securing so that it would only be able to move a few centimeters horizontally during transport. Moreover, it had been sitting in a corner of the apartment for more than 24 hours before I got around to hooking it up.

The specs:
MB: Abit KN8 SLI /w nForce chipset
CPU: AMD Athlon +4400 64bit
PSU: Generic 400W
GPU: Asus Geforce 7900GS
RAM: 4 Kingston HyperX modules - 2x 512Mb, 2x 1Gb
HDDs: 2 Seagate Barracuda - 1x 60Gb, 1x 320Gb

Anyway, the problem is that the monitor gets no input signal. A small box displayed on the screen itself indicates that the monitor searches for analog or digital input - in vain. A few seconds later it slips into standby mode.
What I've done:

Checked all cable connections, both external and internal, quite a few times. Had my brother over to double check it as well. No change.
Checked monitor. I connected the monitor to my laptop, and was able to successfully display images from my laptop on the monitor.
Checked that all the hardware is powered - all fans are running at normal speed and LEDs on the motherboard are lit up. Disconnected motherboard and graphics card power cables and then reconnected them. No change.
Checked graphics card - removed it, inspected it looking for visually obvious damages, then put it back in. No change.
Removed all four memory modules one by one - left in one module that is only a few months old. No change.
Checked the appearance of the motherboard itself. I can spot no transistors or capacitors etc. that appear to be broken or otherwise damaged.
Disconnected all drives - harddisk drives and an optical drive. No change.
Connected a PC speaker I had stashed away. No POST beep is heard at start up. Removed the remaining memory module and started the computer. This triggered 1½-2 seconds beeps until I powered the computer off again.

Any suggestions as to how I proceed from here?

April 21st, 2009, 08:32 AM	#1 (permalink)
Damazzian Junior Member Join Date: Apr 2009 Posts: 2	[SOLVED]"The mystery of the missing input signal" I recently moved to a new apartment, and while the computer worked fine prior that, it worked less than fine when I tried to start it afterwards - this in spite of the fact that we took great care in securing so that it would only be able to move a few centimeters horizontally during transport. Moreover, it had been sitting in a corner of the apartment for more than 24 hours before I got around to hooking it up. The specs: MB: Abit KN8 SLI /w nForce chipset CPU: AMD Athlon +4400 64bit PSU: Generic 400W GPU: Asus Geforce 7900GS RAM: 4 Kingston HyperX modules - 2x 512Mb, 2x 1Gb HDDs: 2 Seagate Barracuda - 1x 60Gb, 1x 320Gb Anyway, the problem is that the monitor gets no input signal. A small box displayed on the screen itself indicates that the monitor searches for analog or digital input - in vain. A few seconds later it slips into standby mode. What I've done: Checked all cable connections, both external and internal, quite a few times. Had my brother over to double check it as well. No change. Checked monitor. I connected the monitor to my laptop, and was able to successfully display images from my laptop on the monitor. Checked that all the hardware is powered - all fans are running at normal speed and LEDs on the motherboard are lit up. Disconnected motherboard and graphics card power cables and then reconnected them. No change. Checked graphics card - removed it, inspected it looking for visually obvious damages, then put it back in. No change. Removed all four memory modules one by one - left in one module that is only a few months old. No change. Checked the appearance of the motherboard itself. I can spot no transistors or capacitors etc. that appear to be broken or otherwise damaged. Disconnected all drives - harddisk drives and an optical drive. No change. Connected a PC speaker I had stashed away. No POST beep is heard at start up. Removed the remaining memory module and started the computer. This triggered 1½-2 seconds beeps until I powered the computer off again. Any suggestions as to how I proceed from here? Last edited by Damazzian : April 21st, 2009 at 10:39 AM. Reason: Editing title to reflect solved status