Question about E-Machines T6520 PC Desktop

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When turning computer on, fans start then shuts down with one long blue light flash around power button. Suspect power supply

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You could be right in your analysis, however, before replacing the PSU unit (a weak point with both Medion and E-machine computers) check the following:

  • That the Power button is not sticking in the case
  • Inside the computer case, the PW wire is firmly making contact with the motherboard (switch to motherboard 2 pin wires)
  • That the PW wire does not have a kink in or is broken giving an intermittent fault
After checking those:

  • Disconnect HDD, DVD Writer, remove 1 stick of ram and test with each removed, replacing each in turn. If the computer still does not boot, then check the ATX connector to the motherboard and the 4 pin auxiliary CPU connector (black and yellow) if fitted
  • Remove the motherboard and check underneath to make sure there are no items of metal that might be causing the board to short out. Check the board underneath for signs of blacking or burning.
  • Replace the board and refit all connections.
  • Inspect the capacitors on the board (small cylinders) if any are bulging at the top, leaking and with a brown residue, the board is failing and will need replacement.
  • Finally, remove the PSU and test with a known good one.
  • If this fails and the board shows no blowing capacitors, the problems may now lie with a blown CPU or micro damage to one of the motherboard circuits

Posted on Jul 18, 2011

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Posted on Jan 02, 2017

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Lamp LED should be lit when the projector is in Standby. However, the problem you are describing sounds like one of two issues. Either the lamp is bad and needs replaced, or there is a power supply fault. If you have tried replacing the lamp already, make sure you reset the lamp counter or the projector may still not function properly.

does the temp warning light come on when the projector shuts off? if so you may also try cleaning the air vent filters and ensure there is proper air flow around the projector. if that checks out then have the projector serviced as the power supply is likely suspect.

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My pc is shutting down and I can't wake it up without shutting down the power from power supply. The Antec 300 tower has two blue lights- the top light starts blinking when it has shut down and I


sounds like a power supply problem

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

http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm



One bad lead can cause a computer to continue on a cycle of restarting or to shutdown or fail to detect/ boot up a computer hard drive



Test all leads that attach to your hard drive power and data cables IDE SATA
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Dell Inspiron 1525 laptop, no power light, battery light flash orange, wifi light flash blue and orange I bought the Dell Inspiron 1525 laptop in 2008. I use the laptop as a desktop, so I never plugged...


Since it sounds like an issue with the Power first try to release flea power.Disconnect the charger,remove battery,press and hold down the power button for 30 seconds.Reconnect the battery and charger.Turn on system and check if it turns on. For further help please check Dell Inspiron 1525 Manual. Also confirm if the light on the charger stays on,when connected to the system.

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Blue button flashes and green light in the back stays on. When I unplug power source, the blue light still flashes for another 10 seconds. When it shuts off completely, I plug it back in--then it...


Power Supply failure. Weak Voltage power rail.

Blue light in the front is the Power On LED light. Green light in the back is on the Power Supply.

Primer:

When a Power Supply is plugged into power, there is a 5 Volt Standby power present in the Power Supply.

When you press the Power On button, this in turn presses against a Power On switch.

The Power On switch is located inside the plastic Power On button.
This is a basic example of a Power On switch,

http://www.directron.com/atxswitch.html

Pressing the Power On switch closes a circuit for the 5 Volt Standby power.
The 5 Volt Standby power is then directed to a circuit inside the Power Supply.

This action turns the Power Supply on.
Power then goes from the Power Supply to the motherboard.
The first chip to receive power is the BIOS chip.

[Chip and Chipset are slang terms for I.C.
Integrated Circuit,

http://en.wikipedia.org/wiki/Integrated_circuit

BIOS = Basic Input/Output System ]

The BIOS chip has the BIOS program burned into it.

BIOS, (The BIOS program), looks to see what devices are installed, does a Ram Memory count, TURNS the Processor on, and hands the computer over to the operating system.

(Windows XP is one example of an O/S. Operating System)

Secondly,
1) ALL of the LED lights, use less than 1 Watt of power from the Power Supply.

[ The HP Pavilion a1250n desktop computer, comes with an ATX style of Power Supply, which has a reported Maximum Wattage rating of 300 Watts]

2) EACH fan uses 2 to 3 Watts

3) A typical Processor uses 51 to 125 Watts. Depends on what Processor it is.

[The HP Pavilion a1250n comes an AMD Athlon 64 X2 3800+
This particular Processor uses (Fits into), a Socket 939 processor socket.

The Athlon 64 X2 3800+ can use up to 89 Watts.

http://en.wikipedia.org/wiki/List_of_AMD_Athlon_64_microprocessors#Athlon_64_X2

Look under TDP.

This is what a Socket 939 processor socket looks like,

http://en.wikipedia.org/wiki/Socket_939 ]

You have enough power to light those simpy LED lights, and spin the fans a few times, but not enough power to Turn the Processor on, and keep it on.

No Processor running, No computer.

What causes Power Supply failure?

1) Computer is dirty inside, as well as inside the Power Supply.

In reference to the Power Supply;
The Power Supply used in your computer is an SMPS.
Switched-Mode Power Supply.

http://en.wikipedia.org/wiki/Smps

There are two cooling components,
A) The Fan
B) Heatsink's which are used internally. (Inside)

[Typical construction of a Heatsink is a plate of metal with tall, thin fins protruding from it.
The plate of metal absorbs heat, from whatever object it is placed against.
The tall, thin fins absorb the heat from the plate of metal, and radiate the heat away.

If a fan is used in conjunction with a Heatsink, the air flow from the fan goes in-between the fins, and around the fins, and help to dissipate, (Carry away), the heat ]

When the Fan's blades, center hub, and surrounding cage (Shroud) are clogged with 'Gunk', the Power Supply heats up.

Heat = Wasted Energy

The more heat, the more the Power Supply strains to keep up with the call for power.
Eventually components inside the Power Supply fail, and the Power Supply fails.

2) Low quality Power Supply.
Low quality components are used in the Power Supply

The ATX style of Power Supply is used in a Large percentage of computers out there.
Very readily available.

I would suggest you install a Power Supply with more Wattage.
A computer only uses the power it needs, and NO more.
Won't hurt your computer.

Will help your computer as there will be less strain on the Power Supply.
Also the 300 Watt rating on that Power Supply is bunk.
Padded rating to make the Power Supply look better than it is.

The actual Wattage rating, is more like 60 to 70 percent of what is stated.
(180 Watts to 210 Watts)

Need help in opening your computer case, and replacing the Power Supply, and/or a recommendation for a Power Supply, let me know in a Comment.

[BE SURE to follow Anti-Static Precautions, BEFORE you reach inside your unplugged from power, computer ]

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hope this helps in the decision making process..
Regards.

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Turns on, then shuts down before anything shows on monitor


Is there more than one fan inside the computer? Did you double-check the connection from the fan to the motherboard? Sometimes a computer will shut down if it doesn't sense that the fan is turning on, to prevent the computer from overheating.

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The power light keeps flashing orange


I had my Optiplex GX520 at work shut down abruptly every time I turned it on it in the morning. This would always happen within the first 30 minutes. I would then get the flashing amber light. After starting the PC again, it would stay on all day (over 8 hours) without shutting down again. I found that the power supply was over-heating.

Two things need to be done. First, in order to get the amber light to stop flashing, un-plug the computer from the wall for 30 seconds then plug it back in. OR hold down the power button for 10 seconds or so. The light should stop flashing. Then press the power button again and the PC should start.

But why did it abruptly shut down in the first place? The power supply has a fan-speed-control circuit in it to keep it running slow and quiet when the power supply is cool. It gives the power supply lower voltage when the power supply is cold and higher voltage as the power supply gets warmer. This circuit either is not working correctly or the fan getting sticky over the years and needing more voltage to get it moving when it is cold. I found that the fan was not starting at all and causing the power supply to over-heat.


To keep the fan moving at full speed, I cut the wire to it and wired it to the +12v output directly. Not the fan goes at full speed all the time. And yes, it is nosier. But at work it doesn’t matter.

The best solution would be to just get another power supply from Dell if possible. Or buy a +12v, 70mm fan from Digi-Key and replace the original.

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