Question about Dell Dimension 5100 (D51L1) PC Desktop

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Dell 5100 won't start... Power button blinks yellow.

I recently had a power outage. My PC is plugged into a small UPS system with surge protection. The power was off for 3 hours, my UPS only last 1 hour. After power was restored, I tried to reboot the PC. The power button flashed in yellow and the numbers 1 and 3 flash in green. Whats wrong?

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  • jj19 Jan 08, 2009

    I had the same problem. After Dell 510 shut down the Power button blinks and I cannot power up the machine with by pressing it.   

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Hi disconnect pc and try to charge ups without anything connected

Posted on Dec 04, 2008

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1 Answer

Power light flashes but PC will not boot up following power outage


First off: Protection is important and the ONLY way to go is with a UPS (Battery backup protector). These devices allow the computer to SLOWLEY close down and protect the motherboard and hard drives. Simple bar protectors are of little to no use whatsoever. As for the Start UP; the Boot Sector on the Hard Drive has been compromised. If you attempted to start with the F8 key when you started up the computer and failed to Boot in the Safe Mode, you definitely lost the operating system.
You can try to do a Restore, but that may not be effective.
When a Computer starts, there is usually a Beep (called a Post) and one Beep indicates the motherboard is active. Several beeps indicate a mal-function of the motherboard and it was damaged. In some cases, the Memory (RAM) can be damaged from electrical surge, and thus the computer will not start and the monitor will not be active. Do not touch the internal leads as they are not the problem. In closing, a CPU is very sensitive to power surge and the CPU in some cases can be defective. All in all, with so may options or repair issues; only a professional has the equipment to search for the solution. Good luck: DaytonComputerDoctor@hotmail.com

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Power supply malfunctioning


Most surge protection power boards will protect computer equipment from mains spikes and surges.
A better and more expensive solution is to use an uninterruptible power supply (UPS). These units provide surge and spike protection and also provide power in the event of mains power failure.
Make sure you select an UPS model that meet the power requirements of all your computer equipment that is connected to the UPS with a mains down time of say 1/2 hour to give you time to shut down your computer in an orderly manner.

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I have a ups when light is go than my dell restart why


Try connecting w/o the UPS or directly to the power outlet and observe if your pc will still restart.

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Storm knocked power off late yesterday afternoon....back on this morning. PC won't power up....small green light on back flashing. Modem, router, etc. all back up and running, but PC won't turn...


Hello,
The first thing to try is to cycle the power. To do this, unplug the power cord from the back of the PC and press and hold down the power button on the PC for 5 seconds. This will completely drain any "stuck" power in the components. Now plug the power back into the PC and try booting. If it still does not come back on after this, then you may be dealing with a blown power supply. You can buy replacement power supplies from your local PC shop for about $50 for a 400watt.
To protect your devices in the future, make sure you have a good surge protector and / or a UPS (uninterrupted power supply).
Regards, Chris

May 25, 2011 | HP Pavilion a350n PC Desktop

1 Answer

I recently had a power outage for about an hour. My desktop was protected by a surge protector. After the power came on, my computer won't power up and there's no power light. However, there is a blinking...


if the system will not power on, I would suggest a new power supply as the first troubleshooting option as they are about 1/3 the price of the motherboard. The Flea Power indication on the motherboard only indicates power is reaching the board, not if all needed voltages are being received.
Normally on a Dell, if you are getting power then when you attempt to power on, you usually get a power LED indication on the power button. Solid Green/Blue is normal, Flashing Amber is Power supply bus failure, Solid Amber is normally a motherboard.
If you haven't bypassed the UPS and connected direct to the outlet, I would try that 1st, as the UPS could be the failure too.

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I have a Dell Dimension 5100, after a power outage yestarday, the computer doesnt want to turn on. there is a green light in the motherboard that stays green for as long as i have power conected to the...


The greenlight is probably the UPS [Uninterruptible Power Source]. If the computer was shut down by a normal windows shutdown and the UPS remained plugged into the 120 Volt line and the computer's power supply plugged into the UPS and the UPS NOT turned off, there would still be 5 volt standby voltage applied to the computer's motherboard. ATX type computers never go completely off unless the power supply is turned off or unplugged.
That 5 volts would have to on steadily for the rest of the voltages from the supply to turn on.
If there is a reset button or on off switch at the back where your power cord plugs in toggle it back and forth. You can also try disconnecting the power supply and holding the power button in for about 15 seconds to discharge power.Leave it unplugged for a few minutes. Then try powering it back up again. If those don't work then you might have a bad power supply. They are not hard to replace.
Hope it helps

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2 Answers

I had a power outage and my computer when I tried to turn it back on after the power was turned back on. All it does is have a green light blink on the back of the tower and a small green light on the...


most likely the surge fried one of your ram chips... this is where i would start first sometimes the ram will work as a surge protection for your motherboard

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1 Answer

No power to Dell demension 5100 desktop


If there is no activity whatsoever when you press the power button on than you have likely blown the internal power supply fuse. This will need a technician to repair.

Apr 10, 2009 | Dell Dimension 5100 (D51L1) PC Desktop

3 Answers

Dell dimension power supply / motherboard


you may consider reseating the P1 and P2 cables (from the power supply) connected to the motherboard.


you can go to www.support.dell.com and enter the service tag of your dell system (found at the back of your system) and look for the manual on how to add/remove the parts of the computer.

thanks.

Sep 13, 2008 | Dell Dimension 5100 (D51L1) PC Desktop

1 Answer

Power outage, now pc will not power up at all


OK FIRST A POWER SURGE PROTECTOR WILL ONLY PROTECT YOU 7 % OF THE TIME, WHICH YOU JUST REALIZED. SO YOU NEED TO BUY A BATTERY BACKUP ALSO KNOWN AS A UPS.... I CANNOT STRESS THIS ENOUGH. BRING YOUR PC TO BEST BUY AND THEY WILL TEST YOUR POWER SUPPLY, IF IT TESTS OUT OK THEN YOU BLEW SOMETHING IN YOUR MOTHERBOARD. GET A BATTERY BACKUPS/UPS!!!!!!!!!!!!!!!

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