My amber light is blinking - Dell OptiPlex GX520 PC Desktop

power board problem

In most cases an amber lights are usually just connection lights. They let you know the ethernet cable is connected and able to transfer data.
You will want to ensure the printer has a static ip address set in it's configuration, otherwise the ip address will change from time to time causing print issues.

Lamp is burned out or makes a popping sound.
When the lamp reaches its end of life, it may burn out and may make a loud popping sound.
If this occurs, the projector does not turn back on. To replace the lamp, see on page 38.
LAMP light is solid amber If the LAMP light is solid amber, replace the lamp.
LAMP light is blinking amber If the LAMP light and the Power light are blinking amber, the lamp driver has failed and the projector will automatically shut down.
If the LAMP light is blinking amber and Power light is solid blue, the color wheel has
failed and the projector will automatically shut down.
Unplug the power cord after 3minutes then turn the display on again. If this problem
persists, contact Dell™.
TEMP light is solid amber The projector has overheated. The display automatically shuts down. Turn the display on again after the projector cools down. If the problem persists, contact Dell™.
TEMP light is blinking amber A projector fan has failed and the projector will automatically shut down. If the problem persists, contact Dell™.

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.

Usually if the Amber light is blinking with a new cartridge, that cartridge has bad electronics.

Try replacing the cartridge with another or the old one, if the light goes out it was just a bad cartridge.

make sure that all the cables are connected FULLY.
blinking light means that there is no signal.

The monitor requires service The monitor is not receiving a signal from the computer

ip3300 printer given error message 5100

did you buy the battery brand new or used?

brand new, deffectibe motherboard, bad charger or bad dc socket.

used, change it.

dont worry about the amber light blinking,it just means that your harddrive is working.