Studiomaster horizon 1508??????

Hi

I have a "Powerhouse horizon 1508" powered mixer, and I liberally sprayed switch spray in and around the mic inputs, and after that the mixing desk stays in standby mode, unless you press and hold the standby button. I've had a small household blow heater on it for 6 hours to dry any remaining liquid but to no avail.

Any ideas??

TIA

operators guide (relates to 1508 also)