Having problems with your Acer Aspire M1641-U1521A PC Desktop ?

MY Acer Aspire M1641-U1521A PC Desktop COMES ON BUT IT WON'T RECONIZE THE MONITOR, KEYBOARD, MOUSE, USB ECT. IS IT THE MOTHERBOARD? AND IF SO WHAT DO I NEED TO GET TO REPLACE IT??


Answers :

It may be the motherboard, but more than likely it's just the power supply.
Reasoning? Most (70 to 80%) of the computers that come to my shop, have this problem.

The power for a personal computer power supply is rated in Watts.
Volt's times Amperes = Watts. (A 100 Watt light bulb that operates with 120 volts, uses less than 1 Watt)

The usual culprit are the Electrolytic Capacitors inside the power supply. These are the weakest link. When one or more capacitors start to break down, they create a weak power rail.

(Computer power supply's have a 3.3 Volt power rail, 5 Volt power rail, and 12 Volt power rail)

The power supply has enough power to light- lights, spin fans, and even spin the harddrive. (Harddrive motor is spinning, but nothing is happening. More on this to come)

1.ALL the lights use less than 1 Watt.

2.EACH fan uses 2 to 3 Watts.

3.A typical Processor uses 55 to 125 Watts! Depends on what processor it is. (The Intel Pentium Dual Core E2180 in your computer uses 65 Watts, when operating under a full load)

With no processor running the harddrive just sits there, and spins.

No computer operating because the processor isn't running, means No Signal to the monitor.

Your computer uses the typical ATX style power supply. This is an example of what would work to replace it,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4898173&CatId=1078

(Remember, a computer only uses the power it needs, and no more. If you put a 1000 Watt power supply in your computer, it will not burn up. The computer only uses the power it needs.
Surfing the internet typically uses 100 Watts)

This is not an advertisement for the website, nor the power supply manufacturer. (Although I have bought computer parts from them, and have been satisfied. Newegg is another good place)

There is one more thing I would like you to look at. The same Electrolytic Capacitors that go bad in a power supply, are also used on the motherboard. (Not same capacitors, same design)

Specifically the ones that surround the Processor. These 'Caps' are very critical for a Processor. They are Voltage Regulators. If just One goes bad, the processor won't operate. The processor must have a clean, steady supply of DC electricity, and it must stay within a very narrow range. Cannot be too much, or too little.

This page will help you identify the visual signs of capacitor failure, and where the capacitors are located on a motherboard.

BEFORE you reach inside your open computer case!
1.Computer unplugged from power.
2.TOUCH the metal frame of the computer case to relieve your body pof Static. Static electricity will fry out delicate computer components in a Flash! You won't see it or feel it.

Computer unplugged from power, you're safe.
Touch the metal frame, your computer is safe.

I'm right here if you have additional questions.
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