Ashdown ABM Problem, Need Help Urgently!

[DannyMagicHands]

My Ashdown ABM 300 EVO 2 combo is playing up ,
Every time I plug in and turn the amp on, no signal comes through the speaker, just a constant loud hum , I've tried plugging my amp into a different speaker (as Ashdown were kind enough to let you unplug the stock speaker from the combo), still no change, anybody here got any idea what's up with it? I wanna have a rough idea what's up and how much it'll cost to repair before I send it off, as I'm a bit strapped for cash at the moment.
Thanks

 

[RickenBoogie]

The only way to know, is to have it bench tested by a qualified amp tech.

 

[JAUQO III-X]

It could be any thing. How old it it and how long have you had it?

 

[DannyMagicHands]

I don't know exactly how old it is, but I've had it for 3 years, I'm gonna take it to the guitar shop where i bought it, let him have a look at it

 

[JAUQO III-X]

Might just need a new tube.