|"When I remove the plug the battery light on the computer blinks"|
If you have a desktop computer you don't have a battery led.
You may have an led for a network adapter that still blinks when it is still connected to a router or a modem.
If you DO have a laptop, the mboard or something connected to it is probably damaged.
"Is my power supply toast? About 18 months old in a rebuilt E-machine."
I'm assuming that indicates you have a desktop computer.
If the power failure was caused by a lightning strike, that can do damage even if you are using anti-surge/power spike protection.
By the way, you have to haveEVERYTHING that connects to your computer using such protection - including everything that plugs into AC that plugs into the computer, directly or via a power adapter,AND the cable that connects to the internet, because you can get power surges or spikesfrom ANY of those sources.
If it still has a BESTEC PS, which often comes in emachines cases, it's even more likely.
If it is a BESTEC PS
- there was a successful class action suit in the US against emachines because of problems caused mostly by these PSs
- they have reputation for failing more often than average, and they are also more likely than most PSs to damage something else while failing , often the mboard
- I recommend you DO NOT try to use the computer until the PS fails completely if it hasn't already done so - in that case, the mboard may still be okay now, but it might not be if you do that
- DO NOT replace it with another BESTEC PS!
In most cases you can use any decent standard sized ATX PS that has the same wattage capacity or greater. If you are still using the emachines case, if you tell me the emachines model number I can comfirm that.
Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you get no video and the mboard will not boot all the way.
See response 4 in this:
Try a known working PS with this mboard if you can, rather than taking a chance and buying one new, because if the mboard has been damaged the system will STILL not boot.
You can buy used emachines mboards on the web - there's usually nothing wrong with the other components - but you may want to get or build another system instead that may already have a PS.