Search found 13 matches

by Hathor
Sat May 19, 2018 1:38 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

So, are there any updates to report on this issue? I ask, because I just noticed the same behavior with my Mark V (90) head. EXACT symptom. I have very similar symptoms with my amp. Very random but probably once a week the amp will shut down and back on. I hear the fan shut off, the relays click, a...
by Hathor
Sat Feb 03, 2018 9:27 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

I see. I hope you get a resolve on your issue. Thank you! With the help provided by all you friendly and knowledgeable people on this board, I feel like I am ready to send the amp in for service. In a second reply from MESA the tech writes: HI [name removed], Yes, I did receive your message. One of...
by Hathor
Sat Feb 03, 2018 9:18 am
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

I think I need to make it clear why I don't just contact MESA directly. It is because I alreade have. They gave me this response: Hello [Name Removed], Your request was forwarded to Levytukku (Finland) which is the Scandinavian Distributor for Mesa/Boogie. Your description of the issue is very detai...
by Hathor
Fri Feb 02, 2018 5:21 pm
Forum: Mark V
Topic: Mark V briefly loses power, then comes right back on?
Replies: 34
Views: 14431

Re: Mark V briefly loses power, then comes right back on?

Here's an update on my situation. After sending my amp to my closest Mesa tech to be repaired, they sent it back to me saying the amp was A okay, nothing wrong. The day it returned it cut out again. Talk about frustration. I reported it to the store I bought it from and they said they would not ref...
by Hathor
Fri Feb 02, 2018 5:17 pm
Forum: Mark V
Topic: Mark V briefly loses power, then comes right back on?
Replies: 34
Views: 14431

Re: Mark V briefly loses power, then comes right back on?

I know this is an old topic but I'm having the exact same problem. I wish I had a video recording of it happening but the random occurence and quick revert back to normal operation makes it almost impossible to document. After searching for months this is the first time I find some describing the ex...
by Hathor
Fri Feb 02, 2018 4:53 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

I found this thread.

http://forum.grailtone.com/viewtopic.php?f=33&t=70633

What happens for the OP in this thread is exactly my problem as well.

Click, power down, 1 second, power on, no noticeable loss of sound, all lights off until power on.



I am not the only one. What a relief!!
by Hathor
Fri Feb 02, 2018 3:36 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

A quick question about the fuse:

Is it a digital or thermal fuse that can shut down on failure without blowing, or will the fuse always blow and have to be replaced before powering up is possible again?
by Hathor
Fri Feb 02, 2018 3:27 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

I understand very much, and as a Software Developer who's built many computers as well I'm familiar with the troubleshooting skills. I just wanted to add the caveat in case you weren't aware, or someone else who reads this thread later. I looked into the warranty for you, and it does appear the 5 y...
by Hathor
Fri Feb 02, 2018 11:54 am
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

I'm going to throw something out here that hasn't been mentioned. I'm assuming that you have a mark v, if you do you might want to try putting in a new rectifier tube. Sometimes they can go bad or have intermittent problems. I had one go bad and the amp shut down and turned on by itself really quic...
by Hathor
Thu Feb 01, 2018 6:40 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

I think this is the good old diode problem in the low voltage (relay control) circuit. You might need a diode job. Could you please elaborate just a bit? I have very little technical knowledge about the amp. I'm completely willing to read up on the subject, but if you would take a little time to ex...
by Hathor
Thu Feb 01, 2018 7:46 am
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

I think this is the good old diode problem in the low voltage (relay control) circuit. You might need a diode job. Could you please elaborate just a bit? I have very little technical knowledge about the amp. I'm completely willing to read up on the subject, but if you would take a little time to ex...
by Hathor
Wed Jan 31, 2018 5:59 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Re: Amp turning off and on again quickly

First, be absolutely sure that the removable AC cable is firmly seated in the receptacle on the amp. Also, check the fuse cap to be sure its completely seated. Have you confirmed this issue happens in other locations as well? Friends house, rehearsal space, work, etc? Thank you very much for your a...
by Hathor
Wed Jan 31, 2018 5:24 pm
Forum: Mark V
Topic: Amp turning off and on again quickly
Replies: 23
Views: 9862

Amp turning off and on again quickly

Hello! Just registred, first time poster - I hope I don't violate the rules. I have a problem I experience with my MESA MARK V that is driving me nuts and I can't find anything anywhere on the internet describing my problem. I'm posting here in an attempt to get at least a hint as to what could be t...