newbie question - sound problem on SPV M3100

[d ng]

I've just bought a refurbished SPV M3100 and have installed the MRH 5.7 cooked rom which all seems (seemed?) to work fine.

Now that I've finished installing bits & pieces, I tried to listen to some music through headphones to find that it comes through the left channel only.

I've tried 2 sets of headphones and looking for various settings etc. but no joy...

Any ideas? (I'd like to avoid a hard reset or flashing a fresh rom if possible as I like this one)

Or could it be that I've just been sold a faulty smartphone?

[d ng]

should have said - normal headphones (not BT ones)

I read all the BT headset issues when I searched the forum before posting...