FL
Flyby2

Delay in starting

ITEM: ATEC LCD 32W

There is an increasing time delay between switching on and getting a picture, currently around 15mins, after which the sound gradually increases in pulses until it reaches normal volume.
Once the picture and sound are established the set performs normally in all functions.
Is this an issue which can be sorted by servicing please?
Many thanks in advance for any helpful advice or comments.