Blinking amber light

I have a Dell Optiplex that runs a small CNC machine. The other day I started the computer and while it was booting up I turned the key board over and tapped it on the counter to remove some metal chips that were stuck in the keys. The computer quit working. I opened the back and saw a green blinking light on the mother board. I was told to replace the power supply. I did. Now I have the green blinking light on the mother board and a blinking amber light in the start button and nothing working on the computer. I don't know what to do next.

"I don't know what to do next"...

What's a small CNC machine, and where did the metal chips come from?

A CNC is a computerized numerical controled milling machine. The metal chips came from a part that I had been machining.

You should use a rubberized keyboard protector similar to those used in the food industry, to protect that keyboard. The Dell's motherboard is probably bad

Thank you

I will get a key board cover if I ever get this computer fixed. Is it very hard to replace a mother board?

Thank you for your help!

blinking yellow power light

Hi there, I had a blinking yellow power light and computer would not power up. So I opened it up and saw there was a solid green light on MO. I went over it with a fine tooth comb and I learned that the pins in one of my front usb port were all smushed in and the port would be non functioning, so I took a plastic fork and I moved all the pins back in place and separated from eachother, and wow, the next thing I know, my computer powers up and everything is fine now.

I hope this information can help someone else with that very frustrating yellow light