It IS the Power Supply cjshearer11.
The green LED light flashing is a diagnostic light now. The diagnosis is a bad Power Supply with a Gree LED flashing.
Secondly, notice how the accessories are unplugged, and the Green LED light is solid Green?
1) ALL of the LED lights combined use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts
3) A typical Processor can use 51 to 125 Watts. Depends on what Processor it is.
Compaq Presario SR1350NX?
Uses an Intel Pentium 4, Model 519 (LGA 775 processor socket)
3.06GigaHertz maximum frequency rate (3.06GHz 'speed')
533MegaHertz Front Side Bus. (533MHz FSB)
1MegaByte of L2 cache. (1MB L2 cache)
Can use up to 89 Watts,
http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors#Prescott_.2890.C2.A0nm.29You press the Power On button. Inside the plastic Power On button is a Power On switch.
(Typical ATX power on switch,
http://www.directron.com/atxswitch.html )
The Power On button presses against the Power On switch making a momentary contact.
(The Power On switch is a Momentary Contact Switch)
This closes a circuit temporarily that has 5 volts present. The 5 Volt Standby power.
(The 5 volts is always present when the Power Supply is plugged into power)
The 5 Volts is directed towards a circuit within the Power Supply.
The Soft Power On circuit. (PS_ON)
This in turn 'excites' the Power Supply, and turns the Power Supply on.
(No pun intended)
The first chip on the motherboard to receive power is the BIOS chip.
(Chip and Chipset are slang terms for I.C.
Integrated Circuit)
Burned into the BIOS chip is a small program. The BIOS program.
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, and Windows Vista are two examples of an O/S)
Your Power Supply has a weak voltage power rail.
(There are three main power rails in the SMPS in your Presario computer's Power Supply.
{Switched-Mode Power Supply}
The 3.3 Volt power rail, the 5 volt power rail, and the 12 volt power rail)
Enough power to light LED lights, and maybe spin fans, (Or spin a few times, and stop), but Not enough power to turn the Processor on.
NO Processor operating, no finding the boot record of the Operating System, on the Harddrive.
Do you have a KNOWN to be good, compatible power supply in an unused desktop computer, to use for a test unit?
Someone you may know may have upgraded to a better computer, and have a working computer with a Power Supply that you could borrow.
Needs to be an ATX form factor Power Supply.
Form factor for a Power Supply refers to the size, and shape of the case, for one.
It also applies to the power cables coming out of the power supply.
The size and shape of the case is;
6 inches Wide, 5.5 inches Long, and 3-1/2 inches Tall.
Needs a,
A) 24-pin ATX main power cable,
B) 4-pin ATX +12 Volt power cable,
C) Enough standard 4-pin Peripheral power cables, for the optical drive/s (CD/DVD drive/s),
D) One SATA power cable
A) 24-pin ATX main power cable:
http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24B) 4-pin ATX +12 Volt power cable: (Power for the Processor)
http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4C) SATA power cable: (Power for the SATA Harddrive. 15-pin cable)
http://www.playtool.com/pages/psuconnectors/connectors.html#sataD) Standard 4-pin Peripheral power cable:
http://www.playtool.com/pages/psuconnectors/connectors.html#peripheralThe ATX power supply inside that Presario, is probably rated at a maximum Wattage of 250 to 300 Watts.
Made by some generic Power Supply manufacturer.
Bestec, HiPro, or Delta.
Around 90 percent of the desktop PC's out there use an ATX Power Supply.
You can buy one with as much Wattage as you want, won't hurt the computer.
A computer ONLY uses the power it needs, and No more.
Regards,
joecoolvette