Having problems with your Dell OptiPlex SX270 PC Desktop ?

Won't turn on - power led comes yellow & blinking

\015 The power light goes on yellow and blinking when you press the power button, but the computer will not even turn on at all. Any ideas? I can see a light bulb come on yellow inside the CPU (on the motherboard) when I take off the side panel on the CPU and look inside.\015

Answers :

Please perform the steps mention:
\015\012
\015\012Disconnect the Power cable / A/c adapter/Battery from computer.
\015\012Disconnect External peripherials.
\015\012Hold down the power button on the computer for 10 seconds.
\015\012Reconnect the power cable or A/c adapter and battery or the computer
\015\012Try to turn on the computer
\015\012check for Led's on the computer
\015\012If still no display ,shut down the computer,disconnect power cable.
\015\012Open the computer tower,remove memory modules,reconnect power cable and turn on the computer.If you get a beeping sound after turning on you should be getting beeping sound suggesting the mother board is not bad.Turn on the computer and disconnect power cable from computer.
\015\012Reseat 1 memory at a time if you have 2 memory module or if single memory module reseat in different memory slot,swap memory module.
\015\012Reconnect the power cable and turn on the computer if it boots to desktop possible issue with 1 of the memory module.
\015\012Disconnect the harddrive ide cable from the harddrive .Turn on the computer.
\015\012If still unable to power on .Shutdown the computer and disconnect power cable.Remove video card,sound card ,modem card if any .Connect just the vga cable from monitor to the integrated video port.
\015\012Connect power cable and turn on the computer.
\015\012If computer turns on possible issue with one of PCI or PCI express card.
\015\012If still unable to power on.Disconnect the power connector pin from the motherboard and reconnect it back.Turn on the computer check power power led on motherboard,also check if the processor fan is spinning. if no go then issue with motherboard. Good Luck.!!
Open the Case and check the 2200 6,3 v Capacitors. This system have an issue with "swollen" Leaking Caps. if thay are a bit round on the top you have to replace them or replace the motherboard.
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