I have an old iPad that won't turn on. model a1474 please advise.

The battery may be dead but I have an iPad 3 that was sitting in the box for about six months and I was able to get it up and running after charging it for a while.

Go through these steps first.

If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support

You have a 2013, 1st gen iPad Air model.

That iPad is nearly 7-years old, now!

It IS HIGHLY possible that the internal, rechargeable battery in that iPad has failed.

I suggest contacting/reaching out to Apple Product support and services.

Tap on the first link below and scroll down some to get to the Apple Product Support section and phone numbers for your location/region.

https://www.apple.com/contact/

OR

https://support.apple.com/en-us/HT201232

Best of Luck to You!

You have the original iPad Air WIFI (Late 2013-Early 2014), it looks like the battery is dead. Good luck replacing it