Its desktop clear as day.
does the pc run ok plugged it to another good working monitors
I see that relic monitor there, and I go , gee the CCLF tubes are dead,as all are now, used.
1 test and you learn what is bad, so easy, try a good monitor first.
then we work the end that is bad.
the only good clues are
1: fan runs in PC, both?
2: and no text ever (bad monitor)
1) Is this a laptop or a desktop?
2) What OS are you running?
3) When was the last time that it booted successfully? Did anything change then? Did you upgrade the OS? Did you upgrade the software (firmware) on the processor (Intel or AMD)?
4) Do you see anything on the screen? Compaq logo? Boot options?
SOURCE: Monitor goes blank after seeing XP during boot up.
did u replace the video card with the same kind of model ? i guess yes ... when system starts hit the f8 key and than go in to safe mode ... mouse wont work so use arrow on the keyboard .. and in the safe mode just log in to admin account if available or login to ur account and see if that still happens .. and if it doesnt ... remove the drivers for the graphic card from add and remove programs and restart the system and go in the normal mode and than install the drivers again ... and if the display disappears in the safe mode or u have install a different graphic card than ... reseat the memory cards and that should resolve the issue .... if that doesnt work out when the system starts hit f1 and stay on the BIOS screen for 30 mins if the system doesnt loose display than u need to reinstall OS ... that will surely work out ... the resolutions given above if u follow them correctly u will have a working system in no time
SOURCE: powers up and cpu fan is racing but no boot,
This may be due to a CMOS mother board battery. I know that some tech or expert say that you can still boot without it but my experience is that if the CMOS battery is below 3.4 volts it may or may not post or boot. This battery is about the size of a quarter usually found at Walgreens or Walmart for about 3.00 dollars.
SOURCE: compaq presario sr2030nx won't boot. The fan
Bad Power Supply.
Weak Voltage power rail.
I'm going to explain what is wrong, and why.
Power Supply's are rated in Wattage.
The Power Supply used in a Compaq Presario SR2030NX desktop computer, is a 300 Watt unit.
(ATX style)
1) ALL the lights use Less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts.
3) A typical Processor uses 51 to 125 watts. Depends on what Processor it is.
The Compaq Presario SR2030NX uses an AMD Athlon 64 X2 3800+, processor,
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00754206&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=3245050
The AMD Athlon 64 X2 3800+ processor can use Up To 89 Watts, (Windsor Core)
http://en.wikipedia.org/wiki/List_of_amd_athlon_64_processors#.22Windsor.22_.28F2_.26_F3.2C_90_nm.29
(HP Support lists the Processor as an Athlon 64 (O) 3800+.
The (O) should be an X2)
This means your bad Power Supply has enough power to light lights, and spin fans, but not enough to turn the Processor on.
No Processor running, No computer.
Bad Voltage power rail.
Inside the Power Supply are Electrolytic Capacitors.
Electrolytic Capacitors can break down.
The capacitors are used as Filters.
They filter the incoming AC electricity (Input Stage), and the outgoing DC electricity made by the Power Supply. (Output Stage)
http://en.wikipedia.org/wiki/Switched-mode_power_supply
(Observe the photo to the upper right of the page. The photo can be enlarged by left-clicking on it. It can be enlarged twice)
Electrolytic Capacitor simplified construction:
The Electrolytic Capacitors used in the Power Supply, (And on the motherboard), of a Compaq Presario SR2030NX, are Aluminum Electrolytic Capacitors, which are of the Radial design.
http://en.wikipedia.org/wiki/Electrolytic_capacitor
Observe the two photos of capacitors, shown at the upper right of the page.
The Electrolytic Capacitor example shown at the bottom, of the bottom photo, is the Radial design.
(Short blue capacitor)
The case of the capacitor is an Aluminum 'can'.
Inside the aluminum can are three strips.
1) One strip is an aluminum foil, and is the Conducting strip.
2) One strip is an aluminum foil, and has a non-conducting medium applied to it.
This is the Non-Conducting strip.
3) The last strip is a paper-like medium, and is soaked with Electrolytic paste.
The paper strip soaked with Electrolytic paste, is placed in-between the Conducting, and Non-Conducting strips, and all three strips are rolled up tightly.
(The Positive lead of the capacitor is attached to the Conducting strip. The Negative lead is attached to the Non-Conducting strip)
When a capacitor breaks down the paste inside develops a gas. (Hydrogen gas)
This gas expands inside the case of the capacitor (Can)
At the bottom of the 'Can' is a seal. It is a synthetic rubber like material, and is shaped like a flat disk.
The top of the 'Can' has a shape etched part way into it.
The shape is commonly an X, or K.
When the gas expands, and develops enough pressure, either the seal at the bottom is compromised, And/Or the etched shape breaks open, to relieve the pressure.
The Electrolytic paste is pushed out.
So much paste loss, and the capacitor operates at a weakened state.
To much paste loss, and the capacitor fails.
A Capacitor as a electronic component that slowly develops a charge, then releases it all at once.
You may compare it to a large swimming pool being filled up by a garden hose, then one wall of the swimming pool is taken down all at once.
This is why the Power Supply worked when you unplugged it for a while, then plugged it back in.
The weakened capacitors paste chemical composition, allowed the capacitor/s to revert back to a working stage once power was removed.
(Power Supply unplugged from power)
When you plugged the Power Supply back into power, the capacitor/s were working again.
Worked with so much paste loss.
Eventually enough paste was pushed out, and the capacitor/s have failed.
What causes Power Supply failure?
1) The inside of the computer is dirty, as well as the inside of the Power Supply.
The cooling components of Power Supply is it's fan, and Heatsink's located inside the Power Supply.
[Refer back to the photo of the open Power Supply, in the SMPS link]
(A Heatsink is a component, that draws heat away from another component.
Typically, a Heatsink is composed of a flat metal plate, that has tall, thin fins protruding from it.
Heat is absorbed into the flat metal plate, whereby it is absorbed into the tall, thin fins.
The fins radiate the heat away.
When a fan is used in conjunction with a Heatsink, the air produced by the fan goes in-between, and around the fins, and helps carry heat away)
When the fan's blades, center hub, and surrounding cage are dirty, and the Heatsink/s are dirty, the cooling capacity drops tremendously.
Again, Heat = Wasted Energy.
The Power Supply tries to keep up with the call for power, and eventually components inside the Power Supply fail.
Electrolytic Capacitors are the weakest link, and typically fail first.
2) The computer manufacturer used a cheap quality Power Supply.
Cheap quality components used inside the Power Supply.
If you wish I can guide you in testing the Power Supply.
You'll need an inexpensive multimeter, or an inexpensive power supply tester.
(One example of an inexpensive power supply tester,
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5250576&CatId=5471 )
Or if you have a KNOWN to be good, compatible power supply, you can use it for a test unit.
Need help in finding a replacement Power Supply, or information in how to replace it, simply state so in a Comment.
?? Fresh copy Installation OR
?? Repair Option
Thanks.
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