Tried allsorts ?

Ref Hygena Select 620 Single Built Under Oven .....Have read thougherly through this site and tried allsorts of the various suggestions , but , still no joy. The Power was turned off and I thought I'd cracked it by reading these messages , but , alas .... NO. Nomatter what I try nothing on the display changes from the AUTO SYMBOL and 00.00 on the time. Have tried turning power off again and re-trying to no avail. Cant use cooker at all at the minute. HELP ..............( somebody ) PLEEEEEESE . Cheers ... Driving me nuts. Al