graspa

Please have patience with a newbie. This does not feel specific to Octavia III (2013 1.2T S), but I can't see anywhere else to post it. Earlier this week, my Bolero Infotainment unit suddenly started to hit problems. It had previously worked fine for the previous 3.5 years I have owned the Octavia. As soon as I switched the Power button on, it would turn itself on again within 3 seconds. After that it might not respond to pressing the Power button again, unless I held it down for 15-20 seconds, and then it would switch itself on for 5 seconds, and turn off again. I tried disconnecting the vehicle battery to see if that had any effect, but none. I have never updated the unit in terms of software during my ownership. Not sure if I was meant to. The car has also been nowhere near a Skoda dealer until today. So the dealer looked today, and "found vehicle required new 5f control unit £1115 inc VAT", which is way beyond what I was expecting. Does anybody know if there are any alternative options please? Or do I have to pay £1115 to continue listening to Neil Diamond in my car?