Will not power on

No worries here.
According to Uniden, the 6 amp fast blow fuse is the correct one.
Not entirely sure why there'd be a 2 amp with your old radio, but I suspect the radio is good.

-Steve


Uniden VHF radio fuse Google Search

To fix: turn on unit, turn volume all the way down to 00, push and hold volume button for 10 seconds until beep then release, then turn volume all the way up to 50 (max) and push and release volume button.

there is a little button that u push with like a tooth pick or pen

After sitting all day in the parking lot at work, I started the truck to go home and everything seemed back to normal. There must be some sort of time related reset. I have not tried pushing the MODE button again and probably won't until I need to.

In the battery compartment is a small button marked "reset". Push this in after the batteries are installed and the buttons should work. You will have to reset everything.

I'm not sure if this will assist all who have this issue, but I noticed this morning when my radio would not come on (after about two hours of pressing every button on the thing), that the Off/Reset button was slightly jammed at the top of the button. I popped it out and my radio came right back on. That may explain why, each time this has happened, it finally comes on after hitting the button several times, it pops the button back out so the radio works again... Hope this helps!

I HAVE SAME PROBLEM. AFTER I REPLACED MY DEAD BATTERY MY AIWA CDC-X304 IS STUCK IN THE DEMO MODE. ONLY CD WORKS BUT ALL BUTTONS ON FACING DO NOT RESPOND. ANY SUGGESTIONS HOW TO RESET.

RESETTING THE CLOCK AFTER A TOTAL MEMORY LOSS

If you do not change the built in lithium battery within a reasonable period of time after you see the ‘flashing’ LOW BATT. warning indicator, the lithium battery may become exhausted and will no longer be able to supply back up power to the SmartSet internal computer.

If the unit is disconnected from the AC outlet after the battery is exhausted, or if a power interruption occurs, the SmartSet memory will be lost and the clock will need to be reset when the power is restored. Be sure to install a fresh lithium battery before you reset the clock, otherwise the clock will need to be reset each time the power is interrupted.

If the lithium battery is exhausted and you experience an interruption in the AC power supply, the clock will reset itself to its initial default setting when the power is restored.

The initial default setting is “12:00 AM, Saturday, January 1
(1 1), 2005”.

If you notice that the time on your SmartSet clock radio is completely incorrect, and the day indicator is also wrong, press the MONTH/DATE button to see the date. If the date display is showing “1 1” (January 1 ), you probably experienced
a total memory loss. To reset the clock after a total memory loss, proceed as follows:

1.) Install a new CR2430 lithium battery in the battery compartment.

2.) Connect the radio to your AC outlet and let the clock set itself.

3.) Depress the MONTH/DATE and TIME buttons together. The display will change from ‘time’ to ‘year’. While holding the MONTH/DATE and TIME buttons, press the UP button to
set the display to the correct year, then release the buttons.

4.) Depress the MONTH/DATE button. The display will change from ‘time’ to 'month/date’ (mm/dd). While holding the MONTH/DATE button, press the UP button to set the display
to the correct month and date. The Day indicator will change automatically as you adjust the month/date settings. When the correct month and date appear on the display, release the buttons.

5.) Depress the TIME button and the UP button to set the display to the correct time. Be sure to confirm that you have set the time correctly to ‘AM’ or ‘PM’ by observing the AM indicator.

6.) After you set the time, reconfirm that the Day, and Month/Date displays are still correct. Make final adjustments if necessary.

The SmartSet clock memory is now reset and the new lithium battery will maintain it for the next 5 to 8 years, depending on the number and duration of the power outages you experience.

IMPORTANT NOTE:
After resetting the clock, don’t forget to reset your wake up times, and alarm mode settings, and sleep timer settings as well.

Sounds like you're not getting voltage on the accessory power lead. This is the red wire at the back of the deck, and it supplies power whenever the key is switched on. It's possible that your vehicle's radio fuse is blown.

The reset button didn't work for me.