|"I had a lightning strike (practically struck our house) and it took out our computers (even though they were plugged in to battery backups)."|
You're not truly protected from power spikes and surges unless EVERYTHING that connects to the computer is connected to something that protects against power spikes and surges - all devices that plug into your computer that plug into AC directly or via an AC to DC adapter, AND the cable that connects you to the internet (coax or telephone line) if you're connecting to the internet from the computer via a network cable, AND the telephone line if you're using a dial-up modem. UPSs usually don't have enough plug ins or ports to connect everything to them.
A nearby lightning strike, or a lightning strike on the AC power grid near you, can produce power surges or spikes or both that can get past any protection device, and that can even jump switches that are switched off, if the cord to the computer was plugged in at the time.
You may find that more than just the wireless card was damaged.
"I ran a test on the computer and it has the number for the motherboard (I believe it’s made by eMachines) as: EMCP73VT-PM"
In most cases, emachines did NOT make the mboard in their desktop system.
According to the list here:
this is your mboard:
It's an ECS model and was supplied to emachines. It may be an OEM only model, a model made only for brand name system builders, or it may be identical to a retail ECS model. In either case, it probably has an emachines bios version rather than an ECS bios version.
It may not have been made by ECS either. Many ECS models are/were actually by Hsing Tech - the same company that sells their mboards as retail PCChips models. In that case, there is no mboard model printed on the mboard surface.
The manual link there no longer works and is for the GF7050VT-M5, which is similar to the MCP73VT-PM.
Manuals here, but you have to become a member: