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Computer wont start

The Macintosh performa 5260/120 has a limited power output from the power board (.64v should be 5v and 2.4v should be 12v) what to do?????

Who do I talk to and what suggestions can you offer
P.S. I am disabled and don't have much money

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If they are the voltages when it's not connected to the computer then it sounds like you need a new supply.

Posted on Mar 19, 2008

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1 Answer

Can I tap a -5v into a BESTEC atx-250-12z-rev d2 power supply ?


The output from the power supply is
Output Max. Load +5Vsb 2A -12V 0.3A +12V 13A +5V 30A -5V 0.3A +3.3V 20A Pin 18 out of 20 white -5 volts (optional)
20 out of 24 white -5 volts (optional) See the definitive connector definition.
All about the various PC power supply cables and connectors

Mar 05, 2015 | PC Desktops

1 Answer

My e machines pc wont power on. theres a constant blue light around the ring of the power button, but thats it. no fans, no sound nothing. I have the t5062 model. before this happend, i put a passcode on...


Probably you have a Bad Power Supply.. ATX power supply has 3 different output voltage 12v, 5v and 3.3v, you can check it by using a Digital VOM..
that problem is caused by lost of 12v.
its better to buy a new power supply

Please give me feed back for more help, hope this help

Sep 16, 2011 | E-Machines eMachines Desktop PC

1 Answer

Start up light flashes once and it won't power on


Most probable cause is the power supply. Look at the back of the computer, check the voltage settings located near the power cord. This will be the small red tab indicating two different settings, If your in the US it should be set to 115. Also, the power supply should run the internal fan when it is turned on.

To test the power supply try this:

Open your computer case and locate the gray box that is the power supply unit. Trace the wires from the power supply to the boards and devices and disconnect all the cables by unplugging them.

Find the big connector plugged on the the motherboard, make sure it is disconnected and short the two pins: (GREEN & BLACK) Short green pin (14) to GND (any black) to switch power supply ON, disconnect green from GND to switch OFF.

This will switch the power supply, you should hear or see the fan in the power supply spin. If you do not see the fan spinning, and your sure you have shorted the correct wires, you have a faulty power supply. If you see the fan spinning, you can now test the voltage coming out of the power supply.

Place a volt meter on the following colors to test voltage:

The color code for the wires is: Red = +5V, Black = Ground (0V), White = -5V, Yellow = +12V, Blue = -12V, Orange = +3.3V, Purple = +5V Standby (not used), Gray = power is on (output), and Green = Turn DC on (input).

Feb 12, 2011 | HP Pavilion a6110n PC Desktop

1 Answer

Hp Pavilion getting no power after relocating pc.


the Power transformer has diferent outputs, +5V,-5V,3V,12V and so on.., but has a standby output a low power 5v to power button function.
Your PC have Power supply Defective,
so your must find a usual spare power supply on the market, compatibilty as 115V input and more of 350W power, to have stabilty.

Nov 29, 2009 | HP Pavilion a1519h (EX271AA) PC Desktop

1 Answer

Pin Name Color Description


Yes this is a good list of the voltages to be expected from a newer power supply on just the main header

Apr 01, 2009 | HP Compaq dc7100 PC Desktop

2 Answers

HP DESKTOP COMPUTER


If computer is not powering on then open u r cpu and check the SMPS i.e Switch mode power supply which converts AC to DC it gives a output of 5v & 12v in that the 20 pin or 24 pin connector which is connected to the mother board remove that and short the wires Green and Black and make sure to remove all the power connectors i.e,hard disk,Cdrom or cd writer or DVD writer or any other device and one more connecto which is a four pin connector which is connected to the mother board please remove and test the 20 or 24 pin connector by shorting green and black and behind the smps u have a power cord of ac 220v just plug it and switch on if smps fan rotates that means it's fine then the problem willbe on the mother board just try this

Jul 30, 2008 | PC Desktops

1 Answer

MY COMPUTER JUST STOPEED AND I NEED 2 KNOW THE SPECIFACAITIONS ON THE POWER SUPPLY


If you are using latest system you need

Ac input : 220vac 3a 50hz

450watt minimum
Atx 2.03
Atx 12v

Dc output
+5v 28a -5v 0.6a
+12v 15a -12v 0.6a
+3.3v 16a +5vsb 2a

Apr 16, 2008 | PC Desktops

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