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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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
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.
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).
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.
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
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!!!!!!!!!!!!!!!