2001 Audi A3 electrical problem

[Mr.Edgar]

• Hello,
  I have a problem with my Audi A3 SE 1.6 2001 (Y-reg).
  If car was not driven for more than 2 days it is impossible to switch on engine without booster (battery runs off). However when I trying to
  switch it without booster it shows "FUSE". After boosting everything seems ok and even after 15 minutes drive engine starts normally.
  I guess it could be Alarm Fuse problem because sometimes it starts alarm without any reason. Have tried to switch off interior monitor (near driver's door) but didn't help.
  OBD2 diagnostic tool shows no faults.
  Any solutions?​
  
  
  

 

[Mr.Edgar]

Maybe this would help to diagnose the problem:

It makes this strange sound and "resets" the dash every 10 seconds.