what can cause "system activity preceding video initialization" and how to solve it in dell optiplex 780 tower

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kushwilly

Commendable
Jun 29, 2016
1
0
1,510
The display does not show anything but the CPU fan is on and louder than normal, diagnostic lights 1,3 and 4 are on and stable(not blinking), same state with and without keyboard and mouse. Also with and without optic drive and hardisk..
 
Solution
hang-the-9
Start at the beginning, your post and title don't match. You don't have a display after you turn on the PC? For the CPU fan blowing hard, maybe a motherboard issue, look it over and check for any capacitors that don't look right. Maybe a power supply issue, CPU issue, motherboard issue, RAM issue. Reseat things, clear the BIOS by unplugging system and removing the CMOS battery for 10 seconds, try things again.
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hang-the-9

hang-the-9

Titan
Mar 25, 2010
60,387
1,081
152,940
Start at the beginning, your post and title don't match. You don't have a display after you turn on the PC? For the CPU fan blowing hard, maybe a motherboard issue, look it over and check for any capacitors that don't look right. Maybe a power supply issue, CPU issue, motherboard issue, RAM issue. Reseat things, clear the BIOS by unplugging system and removing the CMOS battery for 10 seconds, try things again.
 
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