my preamp wont power up


Hi my pre has been unplugged for month.It now wont power up.The fuses are ok,i do live in a area with hi humidity. Any suggestions would be good thanks.
misternice
It sure is.I took it in,and a tech had a look.Theres power going in to around the 4 tube area,then nothing.He didnt want to touch it as he was a sony speacialist and wouldnt have the parts.Ill take it back to australia with me in a week and give it to a audio research service specialist.