ok guys I found the issue, apparently amp was kind of working all along and it was voltage issue with the power supply. Apparently amp was getting just enough voltage to feed the backlight for displays and LEDs for switches, but was not able to drive the digital processor or also maybe entire card.

Here is how I found the reason, last week I dropped this amp at line6 service center, the guy told me to call this week to find out about the status of the amp. I called yesterday and he said the amp is working fine and he has not been able to reproduce this issue for last few days. I was very happy to hear that but was also very confused why amp acted this way, so when I was driving over to pick up the amp I was thinking of common reasons between two times this amp stopped working.

• Both time this amp stopped working when it was plugged in power strip shared by other instruments.
• First time I was sharing power strip with a power mixer, power speakers and a laptop
• Second time I was home and sharing with smaller mixer, desktop computer and video camera charger

But the thing that confused most is that in past I was able to play this amp with my computer, keyboard powered monitor, mixer and another effect processor without any issues why it happened just now. I discussed in detail with service technician who then introduced me to the in-house expert who do lot of outdoor sound and carnivals electric setups. He told me,although indoor aluminum usage for electric wiring is prohibited, builders still use aluminum wiring to run power from street all the way to the main circuit board, and aluminum starts getting bad after 5 or 6 years, but why specially I saw low voltage issue is cause it was raining when this happened with Vetta, and during rain condensation on aluminum creates voltage resistance, and probably voltage in my music room was already border line and all combine factors just pushed it over the limit (under the limit is probably correct phrase). I bought amp home and with all above mentioned items plugged into power strip I turned Vetta on without any issue.

So if anyone else also have this issue make sure you are getting correct voltage and try your amp in a different room which is on a different breaker. A point to note though, there may still be little issue with power distribution in Vetta, cause it really shouldnt partially turn on. If you guys have any comments on power distribution malfunctioning please let me know.

Thanks