Question about E-Machines EMA IMPERIAL GV (845GV) TG3 eMachines (145119) Motherboard

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W2646 crapped out

The pc would not power on, no lights or fans, so i tested the power supply with a multimeter and found out it was bad. i purchased a new power supply and put it in, but still nothing worked. i pulled the new power supply and tested it. it was good. so then i plugged up an older power supply to the machine, eventhough it did not have a 4-pin connector, and the fan on the power supply came on and the light on the front panel came on(amber). what am i dealing with here? am i dealing with a bad motherboard? how do i determine this?

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  • the jenx Jan 29, 2008

    hey philster, sorry i did not reply sooner. i have been running down the problem per your suggestion. bye the way, you hit it right on the head(bad mobo). thanks for the heads up.



    the jenx

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Some eMachines computers (like many from Dell) use a non-standard pin out for their power supplies, so if you try a standard ATX power supply it may not function.

However, in my experience it IS likely to be the motherboard. Luckly I have been able to replace quite a few of the eMachines mobos with a standard mATX mobo, since you can probably remove the IO plate. You'd certainly want to replace the power supply when doing so.

Posted on Jan 26, 2008

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No display


One bad or faulty lead connection can cause a computer to continue restarting on a cycle or to shutdown or fail to detect your hard drive

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.

http://www.kitchentablecomputers.com/static.php - rules


Test all power and data leads that attach to your hard drive IDE,SATA

the leads from your (motherboard to your hard drive) make sure they have secure dust free connections and are not faulty


if its a 40 pin flat ribbon type it will be the first to fail


make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty


even something as small as a faulty electrical fan and its lead can cause you problems

computers need all power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error


make sure your graphics card is securely seated with no dust built up or in the socket

if you remove your graphics check the socket to make sure its dust free


restart your computer then reinstall it this should activate found new hardware wizard


hope this helps

Oct 10, 2012 | Computers & Internet

1 Answer

P5vd2 vm se with led no power


A) Could be a faulty Power On switch.

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

Find the two pins on the motherboard, that the two wires from the Power On switch go to. Unplug those wires. Take a SMALL flat tipped screwdriver, and touch across those two pins.

Power Supply comes on? You have a bad Power On switch.
Is -> Not, the most conclusive test, but an easy one to perform off the bat.

There is a more conclusive test. If using this method the Power Supply does not come on, you have a bad Power Supply. If the Power Supply does come on, you have a bad Power On switch,

http://www.fixya.com/support/t13903733-bypass_soft_power_switch_friont_computer

[The Soft Power On circuit uses 5 Volts DC. In comparison two D cell flashlight batteries store 3 Volts DC. Just in case you are worried about shock ]

NOTE*
A Power Supply with a weak voltage power rail, will Not have enough power to turn the Processor on;

1) If ALL of the LED's were lit up, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power.
Just depends on what Processor it is.

You either have a bad Power On switch, or a Power Supply that doesn't have enough power to blo-w it's nose.

You can test the three main voltages.
A) 3.3 Volts
B) 5 Volts
C) 12 Volts

Just use an economical multimeter set to DC Voltage.
You can purchase an economical multimeter for around $5 to $12.
Available in a multitude of stores. An auto parts store is but one example.

Need guidance post the multimeter's manufacturer name, and model number.

For additional questions please post in a Comment.
Regards,
joecoolvette

Aug 10, 2012 | ASUS P5VD2-VM SE/BULK Motherboard

2 Answers

When my computer starts the power light will blink and the fan starts. When the computer first had problems it froze and the fan turned on and wouldnt stop. I also smelt a burnt rubber smell. I read to...


Yes the voltmeter measures the voltage.
When you power up the computer to test the voltage on the 4 wire connectors.
Test the voltage red and balck wire should read 5 volts.
Test the voltage yellow an black wire should read 12 volts
If the burning smell is from the power supply then most likely a capacitor has blown in the switch mode power supply.
I would advise you purchase a new power supply, do not try and repair it, these mains devices can be dangerous if you don't have knowledge.

Sep 14, 2010 | HP Pavilion a705w PC Desktop

2 Answers

I have a gateway model # gm5088. I power on the computer and work fine, but the blue light doesnt work and the pc doesn't want to boot. What seems to be the problem?


sorry i could not understand u said it work fine but the pc doesnt want to boot. if its only the light issue then the connection of that light to the motherboard must be lossed or the bulb must have been fused

and if ur pc not booting then it ur power supply on *********** board problem

good day

May 29, 2010 | Gateway GM5088 PC Desktop

1 Answer

The pc is switching on and then off after 5 minutes


There are several factors that could cause the above problem in your diagnoses.

A) Processor Fan is not operating, or not spinning at the set speed desired. (RPM. Revolutions Per Minute) Fan bearings are bad.
Replace processor fan.

Computer case open, observe the Processor fan as soon as you start the computer.
If the fan is not spinning, shut the computer down.
(Hold the Power On button in for a count of 10 seconds)

Observe if the fan spins slowly, or spins for a while, stops, then spins again.

B) Failing Electrolytic Capacitors on the motherboard.
C) Power Supply has a weak voltage power rail.


Failing Capacitors on the Motherboard.
Electrolytic Capacitors.
Specifically the one's used in the motherboard Voltage Regulator Circuit.

A Processor must have a Steady, Clean, supply of voltage.
The tolerance range is Very small.
Too little, or too much voltage, the Processor turns off.
[BIOS turns it off]

Part of what the motherboard voltage regulator circuit does, is to regulate voltage for the Processor.

This link gives information about what Electrolytic Capacitors look like installed on a motherboard, and photos plus info, about the visual signs of Electrolytic Capacitor failure,

http://www.capacitorlab.com/visible-failures/index.htm

(Computer unplugged from power. Observe Anti-Static Guidelines. Need more info about the last sentence, please post in a Comment)

Requires either replacing the failing capacitors, or replace the motherboard if bad capacitors are found.

If upon a close scrutiny with a flashlight, and magnifying glass, does not reveal visual signs of capacitor failure, then the next hardware component to check is the Power Supply.

3) Power Supply's have Electrolytic Capacitors also.
A computer power supply changes AC (Alternating Current) electricity from a household, or business, into DC electricity.
(Direct Current. A flashlight battery is an example of stored DC electricity)

Electrolytic Capacitors are used as Filters in a computer power supply.
They filter the incoming AC (Input Stage), and the outgoing DC (Output Stage)

Generally I have found that these are the weakest link, and are the first hardware component to fail in a PSU. (Power Supply Unit)

http://en.wikipedia.org/wiki/Switched-mode_power_supply

There is a way to test the Power Supply.
Requires either a multimeter, or a Power Supply Tester, or using a KNOWN to be good, compatible power supply to substitute, and use as a test unit.

An economical multimeter can be purchased for around $10 to $15 at many stores. An auto parts store usually carries them.
An economical power supply tester can be purchased for around $20.

This is an example of a power supply tester,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5250576&CatId=5471

Computer dirty inside, as well as the inside of the Power Supply, will cause detrimental factors to the computer.

1) Dust is a Static magnet. Dust can create pathways for static electricity to follow, and the DC electricity used for a computer.
This can cause hardware components inside the computer to Short Circuit. (Fry out)

2) Dust, dirt, hair, etc, can clog the cooling components of the computer.
The computer case fan/s, the Processor fan, and Heatsink, and the Power Supply fan, and Heatsink/s located inside the Power Supply.

Air is drawn in through the front of a computer, (Or on some custom PC's through the side), and flows over the hardware components inside the computer, helping to cool them.

If a layer of dust, dirt, hair, and so on, has coated these hardware components, the heat will be trapped, and the air flow will not be able to carry the heat away.

If the computer case fan's are coated, their cooling capacity drops tremendously also. The fan, or fans, will not be able to provide the air flow needed.

If the Processor fan, and Heatsink are coated, the cooling capacity of these two components drops tremendously.
A Processor has a thermal temperature it can operate in, and will turn off if the temperature is exceeded.

It's a Fail Safe feature that is built-in, to keep the Processor from burning up.

[A Heatsink is essentially a plate of metal that has tall, thin fins protruding from it. Heat is absorbed into the plate, whereby it is then absorbed by the tall, thin fins.
Air flows in-between the fins, and helps carry the heat away.

This is an example of an average Fan/Heatsink combo,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2604150&CatId=493

The Heatsink is the aluminum finned part sitting under the fan.

Using a can of compressed air for computers, on a regular basis as needed, can help prevent many computer failures.

To summarize:

1) Check the Processor fan. If the computer is dirty inside, there is the obvious factor for it's failing.
2) Check the capacitors on the motherboard visually.
3) Test the power supply, or substitute it with a Known to be good, compatible unit for a test.

[Compatible
Must have at least the same amount of Wattage, or more.
Must have all the correct power cables needed.
Must have enough of the correct cables]

May 17, 2010 | Computers & Internet

1 Answer

Packard bell imedia 1402 will not boot up power button is flashing amber twice every second also amber led right hand corner on motherboard


Sorry, I stepped out. Otherwise I would have answered right away.

Your power supply changes your household, (Residential),or business electricity, into three main voltages. Also converts it from AC to DC electricity.

1) 3.3 Volts
2) 5 Volts
3) 12 Volts

Each one of these voltages is a voltage power rail.
There's more involved than that, but for ease of explanation, we'll let this suffice.

A) Orange wires are 3.3 Volts. ( 3 and 3/10ths Volts. Sometimes the decimal point is hard to see on here )

B) Red = 5 volts

C) Yellow = 12 Volts

The only power cable you're going to be switching around, in my thoughts, is a 4-pin peripheral power cable.
Has a 4-pin Molex connector on the end.

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

Note that there is one Yellow wire, one Red wire, and two Black wires.

If you have a bad 5 volt power rail, or a bad 12 volt power rail, all the peripheral power cables will be effected.

Won't do you any good changing them out.

They all derive their power from the same source.

I understand your reasoning, and it looks logical, huh? But as you can now see, it doesn't affect anything changing peripheral cables around.

The blinking Power On light indicates you have a bad power supply.
I can't find any documentation on Packard Bell's website to give you, to substantiate my statement to you.

Otherwise I would.

To test my claim.
Do you have another power supply of the same style, and has the right amount of power cables? Also should be at least 200 watt.
You're just going to use it for a test, not as a replacement power supply.

No?

You could conduct a voltage test of the power supply, but if the fan doesn't even spin, the power supply is kaput.

Does the power supply's fan spin?
If so we can go on to do a voltage test.

This will require a multimeter.
The multimeter is set to the 0-50 Volts DC scale.

An economical, but decent enough multimeter, can be purchased in a multitude of places.

An auto parts store is one place.
Radio Shack is another.
There are several stores that carry affordable ones.

Average price for a decent enough multimeter for this test is around $10 to $15.

If you do not wish to use a multimeter, there is also the option of using a simple to use power supply tester.

This is one example, and an example of where to purchase it,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1647108&CatId=1107

Again, this is if the fan on the power supply spins. There is the rare occasion that the fan on the power supply will fail, and the power supply will work, but this is not one of those rare occasions.

Also, if the power supply fan spins a few times, then stops, the power supply is shot.

What leads to power supply failure?

A) The power supply was a low quality item installed by the computer manufacturer.
Saved the manufacturer money.

50 cents to a dollar saved, times 50,000 computers, or more of that model, adds up in a hurry.

B) The computer is dirty inside. Computers need to be kept clean on the inside, as well as their power supply's, on a regular basis.

Inside a Power Supply is a Heatsink, or more than one Heatsink.
A Heatsink is typically constructed of a flat metal base, that has tall fins protruding up from the base.

The metal base absorbs heat from whatever object is placed against it, and the heat is radiated up into the fins, where it is dissipated away.

Air flows through the fins, and helps carry the heat away.
(There is a Heatsink on top of the Processor also)

A Power Supply also has a fan.
The fan draws air into the Power Supply through the computer case, then pushes the air out of the back of the computer case.

The air drawn in through the computer case, helps to keep the hardware components inside the computer case cool, as well as the other fans that are implemented. (Computer case fan/s, Processor fan)

It also helps to keep the hardware components inside the Power Supply cool.

When the Heatsink fins are clogged with gunk, and the fan's blades, center hub, and surrounding shroud, are clogged with gunk, the cooling capacity of the Power Supply drops tremendously.

The Power Supply hardware components heat up.

Heat = Wasted Energy
The Power Supply tries to keep up with the demand for power, but with the energy loss due to excessive heat, the Power Supply hardware components eventually fail.

Typical SMPS used in a computer. (Personal Computer)

http://en.wikipedia.org/wiki/Switched-mode_power_supply


Mar 05, 2010 | Computers & Internet

2 Answers

Dell dimension 5510 it will not turn on, no


1/10th a volt? Nope.

Bypass the Power On switch. See if you have a bad switch first.

Then test the power supply. If the power supply comes on by bypassing the Power On switch, I'll bet you have a weak 12 volt voltage power rail.

1) Yellow wires are 12 Volts
2) Red wires are 5 Volts
3) Orange wires are 3.3 Volts
4) ANY Black wire is a Ground wire

They do sell power supply voltage testers, should you not wish to use a multimeter set at DC volts.
(0 - 50 Volt scale)

I prefer a multimeter.

A) ALL the light use less than 1 Watt
B) EACH fan uses 2 to 3 Watts

C) A typical Processor uses 55 to 125 WATTS.

You have to turn the power supply on, by jumping the Soft Power On wire to any ground wire.

This is also the way to bypass the Power On switch, to see if the switch is bad.

Do you wish to proceed?

Jan 15, 2010 | Dell Dimension E521 PC Desktop

2 Answers

Check Engine LIght Problem code P1491


Don't rush to replace the fan itself until you have tested it. Check the fan relay and relay fuse inside the vehicle. Hopefully it will be just a failed relay and replacement ($12 at dealer) or/and an inexpensive 10amp or 30amp fuse. There can be multiple issues causing this code.

In my case, the fan relay failed (burnt). 2000 Dodge Durango. The PCM was also damaged and requires replacement, awaiting delivery. A remanufactured PCM can be purchased online for substantial less than at the dealer. We tested the fan by supplying power directly to the fan and it runs fine. We had to remove a cover (easy to remove) under the vehicle near the fan to gain access to the connector Use a fused link for testitng to prevent damage during the test. Using a multimeter, I found power 12.5volts from the 30amp fuse circuit which supplies the power for the fan, 12.5 volts from the PCM circuit with the key on, but only 5.16volts from the 10amp fuse circuit with the key on. A continuity test showed the 10amp fuse inside the fuse box inside the vehicle was good. The 30amp fuse in the power distribution box was good when tested for continuity. Checked resistance on all curcuits and they were well within limits. I also checked the wiring to the fan for continuity and resistance. After my tests were completed, a Dodge technican concluded the PCM is bad and is not grounding the circuit as it should. If you want to troubleshoot this yourself, see if your local library has access to ALLDATA which will have diagnostic information and the diagrams of the circuit involved. A Haynes manual for the vehicle, I purchased one at Autozone, can be helpful also.

Apr 23, 2009 | Dodge Pickup Cars & Trucks

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