Problem with BAT VK 3000SE

I am very sorry for not properly respond to your suggestions.  I tried to remove the tube and it is concealed and very difficult to remove and I am trying to find a technician to remove it.

gnanasekhar OP

Sorry, but these are easy to pull and swap over https://ibb.co/GJ5836n

Cheers George

I own the same unit.  You need a Torx T15 tool to remove the top cover.  Yes, there are 16 of the screws but it is easy.  Torx, not allen.  A few more things.  How much clearance do you have above the unit?  It needs at least 8 inches/20cm otherwise you may have a thermal issue causing your fault.    Is your unit for 110v or 220v?  If you have a 110v unit and using a step up transformer on the mains you may try changing the step up transformer.  Have you tried swapping your left and right speakers and seeing if that is causing the fault?  How is the quality of your power?  My experience in India was generally good but power loss, regardless of how short, can cause a problem with the unit.  You can always email/call BAT.  I had a mechanical issue, called and spoke with VK himself to resolve the issue.

The fault exists even after swapping the Tubes and disconnecting the Interconnects and Speaker Cables.  I simply switched on the amp.  Moreover, I contacted BAT and they asked me to send the amp to the factory.  That is an impossible thing sine the shipping cost from India will definitely higher than the amp.