求救!!! 個合併amp. 突然好細聲, 有得維修嗎??

求救!!!  ops:
我有一個柯頌 V6 i合併amp. 每次開聲後兩分鐘後突然無聲,之後把volume推高先可以聽到好細聲!
p.s. 部amp要熄機起碼幾個鐘先可以再有聲,但兩分鐘後又無聲,, 請問有得維修嗎??

Many Thanks!!
ERic.

Hi KK.HO.

Many Thanks for your help!! After i follow your step to check my amp last night. My amp wasn't got any problem at all. So i check all the mechine one by one. And i found that one of the tube in my Tube pre-amp got fail.

Very happy to figure this error out.
Thanks for your help!!
ERic.