1998 Jeep Cherokee No gauges work and will not start

We drove the vehicle about 6+ hrs last Friday. It worked fine. After returning the Jeep sat in the garage with a light on. The voltage got down to about 0.1-volt.

I charged it for a day at 2-amps and it returned to abt 12.3-volts. I then tried to start the vehicle. It turned over with great gusto for long times. This is a new battery. I then noticed there was no gas showing on the gas gauge. I added abt 4-gallons. Same result. I then added 6-gallons of new gas and same result. Also, none of the other gauges are working either.

I checked the fuses and those that are transparent were ok. I could not tell if the fuel pump one was good or not as it is a black rectangle.

I figure some relay has not been tripped and maybe the computer has just lost its data or some such.

Can you help.

Thanks

Rick