Question about E-Machines Bestec ATX-300-12E Rev. D 300w E-Machine GTW Power Supply Part 100929 (ATX30012E) Power Supply

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I have a gateway 506gr with a Bestec atx300 psu. I was having problems being able to turn the computer on, then one day it would not turn on at all. I can push and hold the power button, and hear the psu whir, but the fans do not start up, and nothing boots. I took the power supply to Bestbuy, and they hooked it up and said it tested good. Told me probably a bad mobo.I replaced the mobo, and still had the exact same problem.Could I have a bad processor, or is this really a bad psu that was misdiagnosed?

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Your psu is works fine.
First open cpu cabinet and find motherbord.
Pull CMOS cell from m/b for 10 minutes.
Refix RAM Memory.
Pull procesor fan and processor clean dust from all parts.
Then fix processor fan and processor.
Reconnect ATX connector to m/b.
Remove pci cards from PCI slot then check.
Let me know if you need more assistance.
Thanks.

Posted on Oct 01, 2009

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Posted on Jan 02, 2017

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Not sure which plugs go where on the bestec atx300 power supply for gateway computer. remopved the old powere supply, but don't know which plug goes where on the new one.


I'll assume that your old PSU is also an ATX. First, the plug that has a few dozen wires arranged in a rectangle goes into the MB. Your PSU's ATX connector may be split into 2 parts: the AT portion and a square portion with 4 wires. Together, they make an ATX plug. You'll find some tiny plugs with 2-3 wires for your onboard fans. You might find a few slightly larger flat plugs with 4 wires for old floppy drives. The rest should be the regular MOLEX plugs and slim SATA power plugs for your drives.

Aug 15, 2011 | Gateway Bestec ATX-300-12EB3 305w Power...

1 Answer

Do you know if this PS has a variable speed fan? The fan seem to be running at a consistantly slower than what seems appropriate speed and my computer randomly suts off or restarts.


you might have a faulty PSU power supply unit if the units fan is intermittent and your computer restarts at any time you could try plowing all the dust from it using a high pressure air blower from a compressor make absolutely sure there is no moisture in the airlines you will have to open up your computer to blow the dust from your psu and blow the dust from inside to outside through the back of psu while you are inside your computer blow all dust from your computer
if you have any problems with this post a reply
hope this helps

Aug 03, 2011 | Gateway Bestec ATX-300-12EB3 305w Power...

1 Answer

Lightning storm & power went out for about two seconds. PC plugged into surge protector but would not go back on. Found that surge protector blew and was no good. Got another and plugged all back in...


Your reasoning about the switch mode power supply being damaged is probably right.
Bear in mind that this power supply may not be the only thing that may be damaged in your computer.
You won't know for sure until you borrow a power supply and install it into your computer to see if it will work again.

Jun 18, 2011 | Gateway Bestec ATX-300-12EB3 305w Power...

1 Answer

When I put the plug into the PSU for my sony tower pc the green indicator light just keeps flashing. Now when I unplug the 24 pin connector from the mother board the light on the PSU is steady green. What...


the PSU has Problem . It is not supplying enough voltage to boot the PC, capacitors inside the PSU are weak or damaged. Its dangerus to open the PSU coz, Capacitors have high voltage currents. If you have the Knowledge of electronics, then open the PSU and detect the Weak or Leeky Capacitors and replace them with new one( this method is for experiment and thrill) . But the replacement new PSU is better , perfect and cheaper then repairing the psu from outside. best of luck

Feb 03, 2011 | Gateway Bestec ATX-300-12EB3 305w Power...

1 Answer

Power is out, but the light in the back is blinking, does that mean the power supple is shot ????



Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

Jan 02, 2011 | Gateway Bestec ATX-300-12EB3 305w Power...

1 Answer

No power supply power out, ps fan not coming on, fuse is good


Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

Dec 30, 2010 | Gateway Emachine Bestec ATX-250-12E PS...

1 Answer

My gateway desktop PRB 510S, if I turn it off and unplug it or electricity goes off, the computer wont start back again. Wont do anything. No lights no fan, nothing. Then 5 to 10 minutes after I turn it on...


Try connecting a different power supply to it. If the same situation repeats, then it's an internal (motherboard) problem. If the problems go away, then the power supply needs to be replaced.

6 years... I'm surprised the PSU even lasted that long! The power supply is the cheapest part of the PC and usually one of the first parts to fail. Don't worry, a replacement power supply is not too expensive. Good luck!

Dec 02, 2009 | Gateway Emachine Bestec ATX-250-12E PS...

2 Answers

The PSU bestec atx-250-12e is dead, there is an easy fix for it


Hi,
You can find the same psu at ebay with free shipping.

http://itemlistings.ebay.com/sdcsrp?fl=360131455504&product=bestec+atx-250-12e&sconstraints=PriceMin.Value%3D23.00%26PriceMax.Value%3D45.59

Aug 20, 2009 | Gateway Emachine Bestec ATX-250-12E PS...

2 Answers

Troubleshooting


frist change smps and start your computer then you came to no smps problem 2/ you may be done mistake look information on mother bord where which wire can be added. and also u can get information from wire ledwhere to pluge,3 look your cpu fan is working properly? some time bad fan creat this type problem.

Jun 19, 2009 | Gateway 506GR PC Desktop

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