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Re: E-Machines Desktop won't power on but all components...
There are many places to buy a power supply. And place that sells computer hadware will have them (or online at places like Newegg, Buy, Tiger Direct etc)
They are not that expensive.
Changing it is pretty easy.
4 screws, and the unit will come out.
All the rest is modular plugs to the motherboard, and onboard devices (like hard drive, CD ROM, etc).
Just make sure you buy one that has the correct wattage (you can go higher then what you currently have).
Just make sure it is for the correct style (AT, ATX etc)
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More than likely, your power supply has gone out. Especially since it is an eMachines Desktop, they are notorious for their power supplies. A new power supply costs between $30 and $80. To replace it you usually just have to remove the 4 screws on the back that hold it in place, and unplug all of the components that it is connected to (make note of these as you will need to connect the new one to each of these components again). Plug the new power supply connections into all of the same components as the old one (don't worry if you have leftover plugs, its for expansion purposes), slide the main housing back into place and secure it with the 4 screws you removed before.
It most likely has power supply failure but the backlight smoothing capacitors are common too. If you inspect the components on the circuit boards, you will probably find a burn somewhere (the pop was usually something cooking on the board). Try sniffing around the vents for a burnt smell. All in one units are not a good idea and I never recommend them since you can't just go and buy a cheap power supply or main board etc. You have to buy the special expensive ones for that model only. Go for the simple full size desktop machines (ATX case) for simplicity of repairs. Hope that helps. If you find a burn inside, post another video of it and I'll try to give more advice.
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).
Time to look for a new computer. That and take out your hard drive to copy your files over.
Sounds like motherboard problem. Probably not worth repair.
I've got an HP desktop with similar problems. It turned on one day just fine. The next day not. I don't even get the boot up screens. Disconnecting Hard Drive and CD/DVD components do not help. I should at least get some BIOS POST beeps and a Hard Drive Not Found or such. I do not. On occassion it will boot to a blank screen with white cursor in upper left. Most the time no screen at all. On rare occassion it comes right on and boots Windows. I guess it could be the power switch ... but I doubt that.
Yes you could but eMachines use the cheapest components they can lay their hands on so not really cost effective, things that you could salvage would be DVD writer, power supply and possibly memory but you could probably sell the whole base unit for more than it would cost to buy these components to add to your new build
Most probably the keyboard has konked out. Simply try the same with a working keyboard & mouse, 'cos it seems to get stuck during POST(power on self test) due to one or more components malfunctioning. If you had removed the PS2 jacks recently, check for bent pins too.................sodeep
A simple and effective task (well most of the time) is to reseat components on the motherboard. This can include unplugging the components, including but not limited to:
Hard Drive and Optical Drive Cables IDE/SATA Connectors System Ram AGP / PCI / PCI-E add in cards
Note - Never mess with the processor unless you feel qualified to do so.
If after reseating all the components, the computer still does not boot, try setting in your BIOS to start up from the CDROM and insert your recovery disc into the drive and see if the recovery detects the drive. If it does, its most likely the boot header in the file system has gone kaput. You could attempt a re-installation of Windows by choosing the repair option, however, this is a last resort thing, and if you cannot do this either, then you might be in the market for a new computer.
When a new computer is bought, you might want to buy an external USB Powered enclosure for your hard drive so you can plug it into the new tower and recover all of your documents.
I know how the failing computer feeling feels like........ So good luck!
Do you hear the system POST (Power On Self Test). In layman's terms that's when the system beeps and does a systems check. If you don't here this, the motherboard is usually dead. It could be another component though.
So, if you disconnect everything externally and internally down to the CPU and a few RAM chips (only what's required to do a POST) and a keyboard, to then see if it POSTs.
If it doesn't POST, then, if possible, try a new CPU, RAM, and Keyboard, other than this, you would replace the motherboard.
If it POSTs, you need to let us know how far it gets in the boot process and what error messages appear. If the boot is short of successful, you can still do the same things listed above to see which component is failing. The replace it. A process of elimination.