Problem with CX 2310

[Moondog55]

Hello, I have a Behringer CX 2310 which has just developed an annoying intermittent fault.
The left channel keeps dropping out, I have just opened the cover and I cannot see any obvious loose connection but if I tap the unit (Or in a fit of pique shake it violently ) it comes back in.
Has any-one else had a similar problem???
Being all SMD I don't think it would be worth fixing and they go on sale cheaply all the time, I am a complete novice when dealing with electronics but can use a soldering iron to fix any bad connections, I just cannot see anything obvious.
Thanx in advance
Ted

[Moondog55]

Just talked to one of the blokes at Behringer Australia, at a new price of AUD$199 and some dealers heavily discounting and with the 3-way unit only costing AUD$249- and also discounted I'm not going to bother with a repair ( Not at $80 an hour plus parts plus $55 to open the unit ) so if any-one here in Melbourne wants the chassis for bits contact me, we can work something out
Regards Ted