Inspiron 3650 solid orange power button light.

I have an Inspiron 3650 i3 desktop pc that is a few years old and seldom used. When not in use it is in sleep mode.

Yesterday i tried taking it out of sleep mode, with no luck, and noticed the power button light was solid orange. After a few tries I hard reset the pc and it would not boot up completely. The fans come on and the harddrive sounds like its working but i get no video and the power button remained solid orange. After troubleshooting from several forums i ended up disconnecting everything from the motherboard and taking out the battery then after replacing it and trying to boot with just the cpu fan plugged in. same result, solid orange power button. The PSU seems to be working fine after troubleshooting it so im thinking its either the processor or mobo that has gone bad. Any suggestions?