So I have this two years old Inspiron 620 and it has been working fine for the most part. Last night I accidentally unplugged its power cord while removing another cord from power outlet. And now the system wont switch on.
I am a little hardware aware so I opened it up and I can see the green light behind PSU and I can see there is a constant RED light on motherboard. If i remove the Power Cord both these lights remain on for a good 20 or so seconds and then they go off. I removed all the accessories from the mother board (Hard drive, DVD, Wireless card and stuff) -- I then unplugged RAM and re-installed it, I also removed and plugged back the main motherboard power cable but no luck.
No matter how I try there is no activity on the PC - the CPU fan never rotates. Can someone help me identify what might be wrong with it. I will greatly appreciate it.
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How comfortable are you with electronics? What I would do is try the paperclip trick to test the power supply.
I'm not sure what could have happened but depending on how the power was disconnected, you could have a bad power button, power supply or motherboard.
Thank you for replying.
I am quite into electronics and I have built PC's from ground up and stuff so I am not that novice with it.
I did try to short pin 16(green) and black and yes power supply does switch on and its fan works so its not a power supply issue. I have removed almost everything form the motherboard i.e. Hard drives and LAN/Wifi cards - I also removed both RAM chips and then installed one RAM module back.
When I plug the cable into the pc - there is light behind the powersupply and the red light on the motherboard is also lit. I suspect it is the power button in the ATX casing that is causing the problem.
Is there any specification of that button's cable - I can short that power switch cable if i know which cable is of the power switch
Let me know.
Ok here is a quick update. So on some random thread over the internet I read the tip to disconnect the front panel USB panel's cable that is going into Mother board and yes that did the trick.
Removing the Front USB panel's cable from motherboard has got the job done - I am not sure why that is - but I will investigate and post for future reference
Hello: i am unable to power on my Inspiron 620 and am willing to try to disconnect the "USB panel's cable" from the motherboard but am uncertain which cable to remove. On the front panel is a "block" about 4" wide and 1" high housing two USB ports with 3 black cables (each about 1/4" diameter) going to the motherboard. Is one (or more) of these the "USB panel's cable" that shd be disconnected from motherboard ?
You wrote: "disconnect the front panel USB panel's cable that is going into Mother board and yes that did the trick." It also worked for me !!
There are 3 black cables (each abt 1/4" in diameter) going from the small USB & audio front panel to the MB. Each cable was disconnected then the power was applied. The cables were reinstalled one at a time until all 3 were re-connected. Power on worked as advertised for each step. Hopefully this procedure will not have to be repeated each time it is turned on.
Since there is no logical connection between the USB and audio ports on the front panel with power on capability Dell should be ashamed that they haven't broadcast a workaround until the problem is finally fixed. Frustrated Dell customers are completely justified in refusing to buy future Dell Products. I just joined that group.
Thanx for posting the fix. If you ever discover a reason why this works plz post that too.
There appear to be FIVE ports on "front i/o panel" (2 USB; 2 audio; 1 unidentified) but only THREE plugs on motherboard. If the problem persists and if none of the 5 ports is used can the plugs be permanently disconnected from the motherboard ?
UPDATE : the 3 cables were still connected to motherboard during power on - it failed. When they were unplugged from motherboard power on works as advertised. It's a mystery to me why signal cables should prohibit power on but at least a work-around has been found.