I have no sound. this failure is intermittent. on the output screen the output level is present as if an guitar was connected to the input. but no instrument is connected (input 1 2) / RESET SETTINGS and FACTORY RESET have been done. this happened after an update? maybe? after several restarts QC can sometimes work normally again. then randomly on restart the failure reappears.
It is a known issue which NDSP, as always, denies. I have had it with multiple units, a friend has and there was a thread once on this forum which since then has been deleted.
I forwarded it to support multiple times as well, which has lead to nothing but their standard answer: “unfortunately we can not replicate this issue”.
I would assume it is a software related bug and therefor only solvable by NDSP. But as long as they aren’t working on it, no chance.
Btw, it’s also annoying for amateurs
I found a solution that solved the problem for the moment. I put WD 40 SPECIALIST CONTACT CLEANER (in French: WD 40 NETTOYANT CONTACT ) in all the inputs and outputs and power supply: it is a “dry liquid” that removes impurities and removes oxidation from electrical or electronic equipment) and everything works normally again. In summary: oxidation? dirt?
In practice I put the product in the sockets on the rear panel several times, also inserting a jack or the power supply socket with an in/out movement.
I found a solution that solved the problem for the moment. I put WD 40 SPECIALIST CONTACT CLEANER (in French: WD 40 NETTOYANT CONTACT ) in all the inputs and outputs and power supply: it is a “dry liquid” that removes impurities and removes oxidation from electrical or electronic equipment) and everything works normally again. In summary: oxidation? dirt?
In practice I put the product in the sockets on the rear panel several times, also inserting a jack or the power supply socket with an in/out movement
Hey guys, I had this issue for several weeks now and got it fixed. It is an absolutely weired story but I want to share it with you.
Last year I played a festival with my second band. Our quad cortex had issues booting up. Just flashing footswitch leds but a dead screen. We had to borrow a quad cortex from another band which was kind enough to give it to us. I took our qc home and tried to fix it. Rebooting/restarting several times, resetting setting… no success. I removed the backplate to check the memory sd card. Removed and reinserted it. No success still no reboot. I picked the quad cortex up and put it on the front back edge at a slight angle and let it drop. Just a little bit to give it a small clap. And it worked. Since then there is no booting issue. I could not believe that it worked but it did…
A few weeks ago from today, my own quad cortex (which is another device, not the one that had the booting issue) started to have issues with the analogue inputs 1 and 2. I tried everything mentioned above. I tried several power outlets (which was the fix for this issue a few months ago) but no success. I remembered that I fixed the booting issue by dropping it from a slight angle. I tried it with my quad cortex and guess what… It worked…
What I wanna say with both stories: I do not know if it really fixed the issues but it has to be a huge coincidence if both quad cortexes randomly started to work again. In my opinion some issues are hardware issues and might have to do with the electronics inside the quad cortex.
This post should not encourage you to be violent against your gear… obviously. I want to share it with you so you can decide if you want to try that “bug fix” for yourselves…
Greetings!
David
PS: Some other users said they had the same issues and they have send theirs quad cortexes to NDSP to get it to check. NDSP could not confirm the issue. Maybe the quad cortexes got some little claps during the transport and using some magic… it works again…