How to change the battery in a Kettler Astro cross trainer

Replacing the Batteries

• Open front cover and locate the battery compartment door.
• Gently remove the two "AA" alkaline batteries located in the battery compartment.
• Install two new "AA" alkaline batteries into battery compartment. Make sure to match the positive (+) ends of the batteries with the positive (+) terminals located in the battery compartment.
• Close battery compartment. The low battery indicator should not appear in the display.

Replacing the Batteries
1.Open front cover and locate the battery compartment door.
2.Gently remove the two "AA" alkaline batteries located in the battery compartment.
3.Install two new "AA" alkaline batteries into battery compartment. Make sure to
match the positive (+) ends of the batteries with the positive (+) terminals
located in the battery compartment.
4.Close battery compartment. The low battery indicator should not appear n the display

What's wrong, is the readout simply not working? If thats all it's the battery, which is easy to replace but a little harder to find. Just in case it's the battery I'll paste here my solution:
If you look behind the unit, (directly behind the digital readout) you'll see a small rectangular inset, if you look up in that (I used my cell phone light), you'll see a tab that you can pry with a screwdriver gently to release the computer section. Just keep one hand on top, when you pry it you'll feel the unit pop up, then you can lift it out. It takes 2 AA batteries, thankfully not some bizarre disk batteries :)
Btw when you look at the readout, you'll notice it's set in a silver square- that square is the computer module that pops out.
Hope this helps!

Look for a tiny cross head screw then look for a small cross head screwdriver! ;-)

That will open a compartment that you need to put 2 AA batteries in.

Don't open the triangular screws - you will have tiny cog wheels all over the floor!