Reboot w/ new power supply

Generally, a flashing amber power LED on the Tower indicates a failed power supply
http://www.fixya.com/support/r4282412-find_no_post_diagnostic_information_dell

If the power LED is flashing amber then the most likely failure is the power supply
http://www.fixya.com/support/r4282412-find_no_post_diagnostic_information_dell

If the power light is blinking Amber or Yellow, your power supply is no good. You can purchase a new power supply either online at places like http://www.tigerdirect.com or you can take your whole computer into a store like bestbuy and ask them to show you power supplies that will work with your computer.

If you are unsure on how to replace your power supply, I would suggest taking it to someone that will install it properly.

There are also a lot of videos out there like this one:

http://video.about.com/pcsupport/powersupply.htm

That show you how to do it yourself. Just make sure all the power connections are connected or you might have devices that dont' work properly.

Have a great day.

I'm not clear about the blinking amber light you are referring to. Is it on the computer or the monitor.
I checked Dell's web site for the service manual for this computer model, & found this document:
http://support.dell.com/support/edocs/systems/dim8300/sm/adtshoot.htm#1102195

If the blinking amber light is on the monitor, check the connection between it & the computer itself. Make sure the cable is not damaged & that it does not have any broken pins in the socket.

its a power problem. Your power supply is not giving enough power

A Blinking Amber or Yellow power button means that the power supply is receiving power from the source but is unable to properly distribute it to the components. This can be caused by a defective power supply or a defective motherboard. Just to make sure that nothing else is causing the problem, remove any PCI cards like modem, video card, sound card, etc... Remove the memory modules and disconnect cables to CD/DVD drives. Look at the USB ports to see if any are damaged.


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Unplug the power cable and press and hold the power button for several seconds to discharge the system. Then allow several minutes before reconnecting the power cable. If the problem still persists, it may be a failed power supply.

Hi Sherri,
The symptom that you are facing generally refers to bad power supply. The same can be resolved by replacing the same. You can call dell sales to procure a new power supply. However to troubleshoot and make sure if power supply has gone bad , use the link below

http://tinyurl.com/6ezjbp


Thanks
proton

Does your machine turn on? Is the blinking light red or amber? If you have it plugged into a UPS or surge protector try directly into wall socket.
Please give a little more description, also what was the last thing you did before this happened?

check your power supply. A flashing amber power button usually means its gone bad