Solid amber light in front of desktop, nothing else work
Bad power supplies, motherboards, and front panel connectors have plagued this model since Dell started selling them. I had the same model and after 3 motherboard replacements, 2 front panel fixes, and 3 power supplies it still only worked sporadically. In reality only Dell tech Support has the answer to the specific code as they do not publish them. After much research found out the design was flawed. You can try to keep fixing or you can go the route I did and cannabalize the RAM, video card, hdd's, cpu, & optical drives and purchase a barebones kit that is compatible with your parts. I found one for mine for less than $200. Hope this helps.