Bottons on microwave do not work

Make & model of the microwave?

Try this link for a manual for your unit:
http://data.manualslib.com/pdf4/96/9507/950622-bosch/hmc80251uc.pdf?023852a6c87a7941a344ce028869b054&take=binary

Hey JT Tai, I appreciate your post!
The symbol at the top left hand side of your display could be child lock symbol or vent symbol. If it is the child lock you should be able to press and hold the stop/cancel button down for 3 seconds to release the child lock.

If the light is on for the vent I would seek assistance from a professional for proper diagnosis and repair to be completed on your microwave. I hope this is helpful. -Matt

Select "User Pref" upper right corner of keypad, then select from menu "Clock" (item 5), then enter time, select "Start" - you are have just set the clock for Frigidaire FGMV174KFB

Press and hold CANCEL/OFF button until "UNLOCK" appears on display screen.

Look for the key on the key pad on the right side. Push the one that says clock on it. Then push 3:35, and leave alone until it stops blinking, and then it should be set. The only other thing you want to check is if they have an am/pm setting in the upper left hand corner of the digital display window. Most don't, but its always good to check. If you have any further questions, feel free to contact me and I'll help you figure it out. Good Luck!

HI, this board is damaged. I recommend replacing the touch-pad board asap. This will fix your issue.

Hi, probably something happened with the PCB due to an abnormal current fluctuation.
You should go to a service center.

hi
it sound like the keypad has died does happan on sharps does the light come on when you open the door ,onother problem that can happen is if one of the microswitches is sticking from storage ,if they are not working in sync then the keypad won't work
cheers grant

i have the same microwave and mine does the same thing,try this push the clock button and enter the time or just push 100 and hit the clock button and then enter in your cook time and hit start.