How do i know when my mother board is gone - Compaq Presario SR1000T (568657) PC Desktop

Were there signs?

Motherboard wasn't eating right?

Seemed lethargic, and depressed?

Leave any notes behind, or talked to anyone before leaving?


OH, I'M JUST KIDDING!

1) Look at the Electrolytic Capacitors on the motherboard,
(Specifically, they are Radial Aluminum Electrolytic Capacitors)

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

http://www.youtube.com/watch?v=Lut7MX5Dd_A

2) However, I bet the computer is dirty inside, and the Power Supply is bad.

Motherboards get blamed all the time, when the problem is a Power Supply with a weak voltage power rail.

( I just saw a line of motherboards go down the street yesterday, with protest signs. "Unfair to Motherboards"




NO, you gonna' believe that? )

Know this;
1) If ALL of the LED lights were on at once, they would use less than 1 Watt of power.

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

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

Compaq Presario SR1000T?

http://h10025.www1.hp.com/ewfrf/wc/product?product=407669&lc=en&cc=us&dlc=en

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00139539&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=407669#N516

http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors#Prescott_.2890.C2.A0nm.29

Up To 89 Watts. (TDP)

This is why you may see LED lights, light; and possibly fans spin; but no computer working;
Not enough power to turn the Processor on.

You can test the voltages coming out of the Power Supply, with a multimeter; or temporarily use a KNOWN to be good, Compatible power supply, from a working computer.

The Dangerous voltages are kept within the metal case, of the Power Supply.
The 100 to 240 Volts AC.

Your Power Supply is a converter.
It converts the 100 ~ 240 Volts AC, down to three low DC Voltages;
3.3 Volts
5 Volts
12 Volts

In comparison two D cell flashlight batteries produce 3 Volts DC.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00063272&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=407669#N526

For additional questions please post in a Comment.

Regards,
joecoolvette