HP not booting up, amber warning light flickering at times

Just got back from vacation and moved my mouse and keyboard but nothing came on screen. Changed batteries, reset, nothing. Have tried a manual reboot but still nothing. I've noticed on the front panel there is an amber warning light flickering with pictures of discs below it. What does that mean? I pushed the button below that, the tray opened and there is no disc inside. I pushed the button below that and nothing happened. Any ideas what to do or try next? It's the P6000 series and I think I was running IE 7. There is power to tower hence the amber light and the light blue button on top is lit and power to monitor, remains orange, never gets to green. Screen remains black.

 

I believe the amber light with pictures of discs below is the HDD activity indicator.

 

It is a 6610f. I left it unplugged overnight, reconnected and now it booted up. It previously would not make any beeps or flashing of lights. Not sure what was up. Ran Malware bytes and Superanti Spyware after, a few potentials I deleted but nothing major. The one problem I do have now is I can"t doubleclick on any icons. Nothing happens. But I can go to start menu, bring up program, click on it and it opens. Mouse does everything else Ok and batteries are new. Is there a way to fix this?

 

Is the model no. perhaps p6610f?