Dell Desktop not turning on with 2 and 3 light + an amber light

I mean look at these pictures 

Solid orange light typically means bad MB, so it's possible it's the CPU.  Blinking orange would mean bad PSU.

As fun as it is to do everything at once, a good rule of thumb is to install one piece at a time and see if PC works.

Back off one piece at a time and see if that gets it working again.  I'd remove the GPU first simply because it's easier.  Still the same?  Try the previous CPU, and so on.

It would still help to know model and size of your Optiplex, what PSU was installed, what GPU was installed, as well as the CPU.

Oh and it has a Intel core i3 ,6gb of ram and I don't know what gpu

It is an optiplex 780

And the computers gpu is sotered in so I will try doing everything else now

Solid amber on the MB means it has power.  When the power button has blinking or solid amber, then it's a problem.

From your photos it looks like you have the SFF model.

Optiplex 780 Documentation 

From the 780 Service Manual:

Optiplex 780 Tech Guide.pdf 

Thank you so much I think my harddrive could me bad I have another I will try that thank you 

Update there is only an amber flashing light on the power no beeping at all

So a different error code, no 2 & 3 lights now?

Try replacing the size 2032 CMOS battery if it's 5+ years old.  In this forum, I've seen bad or confusing error codes with bad batteries.

As @AdrianG001 mentioned, blinking amber power light can mean bad PSU.

Dell BIST Test Video 

With the PC off, if you get a green light when you push the PSU test button, then the peripherals are good.  No need to go thru BIST Test.  Forgot to mention sooner.

One option is to run diagnostics.  At startup, immediately and repeatedly press F12 for Boot and Diagnostics menu.  Arrow down to Diagnostics and run it.

First though, did you try the troubleshooting steps mentioned earlier in the thread?

You mean the battery?  Ok.

I tried doing that and nothing happened 

The lights changed to 1 and 2 but I cant fix it

So I removed the 2035 coin battery and removed all the components and in 24 hours or more I will put it back together to see if it works

Amber power light not flashing indicative of bad MB or CPU

So it's now just an amber light