How to set clock to other than 24hr(military)time

To preset a channel on the JCR-425, you tune in the channel; press the "AL/MEM" button on top of the radio (at which time you will probably be switched to some other radio frequency, which is rather disconcerting), press the "Up" or "Down" button to select the desired preset channel number, press "Set" -- and only then are you returned to your desired radio station. If you want to preset several channels,
You might then think that the next time you turn on the radio that all you would have to do is press one of the 10 preset channel buttons on the front of the radio to visit one of your preset radio stations. You would be wrong. You must turn on the radio, then press the "AL/MEM" button on top of the radio. Only then can you access your preset radio stations.
You might also think that to turn on the radio you would press a button that says "Power." Wrong. You press a button that says "Radio." Well, okay. But you might think that to turn it off, you would just press the "Radio" button again. Wrong. If you have pressed the "AL/MEM" button to access your preprogrammed channels, pressing the "Radio" button simply takes you out of the "AL/MEM" function and back to the "FM" (or "AM") function, apparently taking you back to the last radio station you tuned in manually. To turn off the radio after accessing a preset channel, you must press "Radio" twice.

To preset a channel on the JCR-425, you tune in the channel; press the "AL/MEM" button on top of the radio (at which time you will probably be switched to some other radio frequency, which is rather disconcerting), press the "Up" or "Down" button to select the desired preset channel number, press "Set" -- and only then are you returned to your desired radio station. If you want to preset several channels,
You might then think that the next time you turn on the radio that all you would have to do is press one of the 10 preset channel buttons on the front of the radio to visit one of your preset radio stations. You would be wrong. You must turn on the radio, then press the "AL/MEM" button on top of the radio. Only then can you access your preset radio stations.
You might also think that to turn on the radio you would press a button that says "Power." Wrong. You press a button that says "Radio." Well, okay. But you might think that to turn it off, you would just press the "Radio" button again. Wrong. If you have pressed the "AL/MEM" button to access your preprogrammed channels, pressing the "Radio" button simply takes you out of the "AL/MEM" function and back to the "FM" (or "AM") function, apparently taking you back to the last radio station you tuned in manually. To turn off the radio after accessing a preset channel, you must press "Radio" twice.

There is a display button on the unit, if that does not dim the display, there is almost nothing you can do

Kylie, if there is a CD tray press the eject button and put CD in tray, push tray in easy to load. If no CD tray insert CD into CD slot and push gently to load. Some have a lid on top that you simply open with your finger then load CD. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Jensen JCR 310 AM FM Stereo Dual Alarm Clock Radio with CD Player
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Jensen Smart Talk JCR 290 User Manual Page 10

USING MANUAL SETTINGS
In radio off mode, press SET BUTTON (#5) to enter AL1/AL2/Time
setup mode.
1. The HOUR DIGITS and AL1 indicator in the LCD panel will flash.
2. Using the > (UP) (#6) or < (DOWN) (#4) BUTTONS, adjust to the
desired hour for AL1.
3. Press SET BUTTON (#5). The MINUTE DIGITS and AL1 indicator
in the LCD panel will flash (#25).
4. Using the > (UP) (#6) or < (DOWN) (#4) BUTTONS, adjust to the
desired minute for AL1.
5. Press SET BUTTON (#5). The SOUND EFFECT INDICATORS of
AL1 will flash (#25).
6. Use the > (UP) (#6) or < (DOWN) (#4) BUTTONS to choose a
Wakeup Alarm Sound - Ocean, Rain, Brook, Radio or Beep Alarm.
Jensen Smart Talk JCR 290 User Manual Page 9

the 3rd button on the first row said stop/TIME
it only works as "STOP" when the "FUNCTION" knob is on CD otherwhise is the "TIME" setting button akong with the "MINUTE" & "HOUR" buttons in the same row

9 times out of 10 you just have to go to the station and press and hold the number you want that station to be programmed to

Get it on internet,type www.jensen.com and download the manual is free.

i had the same issue; with a little bit of experimenting I was able to set the time. Hold down the stop/time button until it displays 12A (it might display 24H first - do it again if you don't want military time to get the 12A) Let go then press stop/time again so the time blinks. Use the hour and minute buttons to set the time appropriately. When satisfied, press the stop/time button again.

So what is the question? send it back ASAP. As far as i know there are a lot of problems with Jensen CDs...