Question about Dell Vostro 420 Desktop Computer

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Blue. Light keeps flashing - Dell Vostro 420 Desktop Computer

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IF THE POWER LIGHT IS BLINKING BLUE - The computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to resume normal operation.

You can find its Service Manual here
http://downloads.dell.com/Manuals/all-products/esuprt_desktop/esuprt_vostro_desktop/vostro-420_Service%20Manual_en-us.pdf

Posted on Apr 07, 2015

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Posted on Jan 02, 2017

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Fixed amber light - start,shut down itself and restart itself Hello, Yesterday morning, I have installed a second screen linked to my graphic card. I tried to install a 3rd screen on the VGA motherboard, and it didn't work so I take it off. I could work on the computer with the 2 screens all day long. I left my office and the screensaver started. When I came back, I couldn't started my computer and my screen didn't light on after moving the mouse or writting on the keyboard. Then, I shut down my computer to restart it. Here is the problem. 1) The power light was fix and amber, the ventilation works. 2) 2-3 seconds later, it shuts down itself for few seconds 3) And it restarts itself. However, I still have the fix amber light and the screen is not activated. I checked the wall plug, I reduced the number of device on the trailling socket. I removed and reinstalled from the motherboard the RAM memory card and my graphic card. I tried with only one screen. But I still have the same problem. Do you have any ideas about what the problem could be: - Is the motherboard over? - Is the graphic card over? - Is the power bloc over? How could I evaluate which component is not working correctly? Thanks for your precious help. My configuration : - Intel Core 2 Quad Q8200(2,33GHz,1333MHz,4Mo) - Windows Vista - Cordon d'alimentation : Européen 2M - Carte graphique : 256Mo DDR2 ATI Radeon HD 3650 (pleine hauteur,sortie DVI/HDMI/DisplayPort,Double affichage)

Mar 01, 2017 | Dell Vostro 420 Desktop Computer

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