PC will start but won't bootup

Hi. When I push the power button, the pc runs/comes on, green light flashes 5 times on my disk drive, then that stops. Green light stays on where I powered up the pc, monitor says RGB No input Signal. I'm beginning to think it is staying on unless I unplug it because I read somewhere to unplug, push the on/power button, hold for a few seconds to drain the power and then plug it back in. When I plug it back in it starts, I don't have to push the power button.
I changed out the power supply with one I had removed from my Vista. It powered right up. I used the pc for a bit then signed off, went off for a few hours and when I got back it the green light under the power button was blinking so I thought it was in hibernation...........Nope it wasn't. Couldn't get it to wake up and got the message on the monitor again. RGB No input Signal.
I hope this makes sense. Does anyone have a clue what is going on with my pc?
Thanks!
HP SR2030NX

 

I'm pretty sure it's an intergrated video card. I have not tried to plug in another video card and don't have one handy. I don't have anything plugged into the Compaq. Oops, actually I plugged the speakers in a short time ago and heard a pop as though the pc is on. I just checked and the fans are not running but the little light is on in the back on the tower.
I replaced the video card on my HP/ OS Vista, it had an integrated card. The old card is still in there, can it be removed? I guess it's best to buy a new one?

 

Yes it can be removed and replaced with no problem.
What would worry me more is the fans not running. What green light are you talking about?

 

Mr. Bill. The green light is right below the power button right above the Compaq brand name. Then right below that is what I would call the processor light, that blinks when pc is in use. Now it just stays solid like the one above it. Does this makes any sense?

 

Ok on the green light. Thought that is what it was but wanted to be sure.
I agree with Evan on trying another video card and see if that fixes it. Like he said we could trouble shoot it some more if need be. It could also be a flaky cord or the monitor going South on you.

 

It's not the cord or monitor. The pc is running a bit louder than it normally did. Before replacing the PSU it was running like it was on steroids. After replacing the PSU it worked once, ran quitely and now were back to square one. I like that pc but not sure what I am going to do.
My daughter is trying to talk me into getting a laptop but I have a problem controlling them.
Thank you all for your help!

 

Is it pretty clean inside and are the other fans running?

 

Yes. I cleaned it when I replaced the PSU and it really did need the cleaning. Yes, both fans are running.

 

I think you might have a faulty on/off switch.
You stated that when you plugged it in, it started without pushing the button.
Was the PSU identical to the original?
Are any of the capacitors swollen or bulging?
If the capacitors look as I suggest - follow Evans suggestion and make a decision on Desktop or Laptop renewal. Neil.

 

Hi. Sorry for the delay in responding to your post. I haven't done a thing for days other than turn the pc on and watch the light flash but this time it was more like 15 times. However I did order a PSU tester. Hope it will be useful. I'm a little confused on the capacitor issue. Are you asking if I have looked inside the PSU? If so, I didn't know you could, I thought it was sealed, but then I didn't ever look.
Thank you for your help. I am anxious for the tester to arrive and hopefully I can get an answer or two on the problem at hand.

 

He was talking about on the MOBO. You can also look inside the PSU. I know that there is usually a piece of tape on them that says the warranty will be void if broken. No different than pulling the tag off your mattress. LOL.

 

OMG.......Dude, you are too funny, this old gal does good to turn the pc on. It appears that the subject was the PSU so I presumed that is where the capacitors were. I did take pics when I had the cover off and am now going to look at them, (mobo). Hopefully I can tell what's what.
I'll be back! lol

 

There are some in there also. If the PSU comes on it is probably OK or another problem it may have is that it is not supplying the proper voltage on the leads coming out of it. MOBO have more Capacitors problems the the PSU do usually.

 

It appears that the mobo capacitors are ok. They do not looked distorted and the tops are very clean. I was going to send a pic but wasn't sure how to do it on a forum and guess it's really not necessary.
Hopefully I'll get the tester tomorrow and will update post.

 

I haven't received my tester yet but for whatever reason I plugged the speakers back in this morning and heard a pop/static so that confirms that the pc is not off. It appears that retiredlearner is probably correct, the off/on switch is bad. Is that replaceable?

 

Yes it is. They make different varieties. Some of them go straight to the PSU and some to the MOBO. See which you have and then Google it. There are also round ones, square ones and rectangular ones. Some are the same but just a different button to push.

 

Ok MrBill. Thanks. How do I go about finding which one I have?

 

You will have to look. You will have to open the case and look at the button where and see if it goes to the MOBO. If it is a fairly new PC, last 7 or 8 years, you probably have one that goes to the MOBO.