My Quad is all messed up this morning. Getting some weird phantom input signals even without anything plugged in. Any thoughts/ideas?
Thanks for any help!
-David (aka davlavMusic)
1 Like
Bummer!! Still does it when you power cycle it a few times?
Hey @davlav, I am assuming you already tried shutting down for 10-15m and rebooting? Otherwise, I would try backing up (either locally or to the cloud) and performing a factory reset and restore to see if that resolves it. It seems the problem is usually due to something being plugged in but in your case you have everything unplugged and its still has the issue. If the backup/reset/restore doesnāt resolve your issue, definitely suggest to email support@neuraldsp.com and they will hopefully get you sorted quickly.
Although similar, I had the same issue occur with mine a few weeks ago but my issue was due to the USB connected to my PC which was somehow generating full clipping noise on the input. I powered off for a 15-20m and restarted without the USB connected which resolved my issue.
Yes, Iāve definitely tried a full restart of the device. Several times. I havenāt done a reset or backup restore yet.
I emailed support and they had some suggestions that Iāll try out when I get home from work this evening.
Bummer!! Good luck! 
1 Like
So after letting the QC sit all day, unplugged, it not seems the issue is resolved. Weird.
2 Likes
Seems like another I/O trouble again.
There are some topics (search āno soundā or ārebootā), and you could find some remedies.
As I wrote somewhere in this forum, I think this is a bug and hoping for the fix in the next CorOS.
If it could be hardware related trouble, why itās reported so often only in these several months?
Thanks for recording this!
I had the exact same issue at a gig - which was a horror.
Unplugging everything, restarting the device and pluggin in all the cable was the solution.
I had this 3 total times and realized that it mainly happend when changing I/O while the QC was turned of.
I wrote the Support on that case with a detailed explanation but i wasnāt able to record it (under pressure at a gigā¦) so they archived the case until i could give them a Videorecording.
What do you mean by āchanging I/O while the QC is turned offā? Plugging cables in and / or out of the QCs In- and Outputs?
For example:
At home i have the following connected:
Input 1 - Guitar
Output 3 and 4 - Monitors
EXP1+2 -Expression Pedal
Live the following:
Input1
Out 1&2 for FOH
Send1, Ret1, Output3 for 4 cable Method.
At home i did this too the first time i tried the 4cm method and i was wondering why i wasnāt getting any sound. Thought my amp was broken, but the QC was the problem.
After unplugging and restarting it was working. Strange thing is i canāt replicate the same issue. It happens sporadically.
Hi Davlav.
Out of interest, were you able to get any sound out of the QC?
Iām afraid to say this looks very much like the issue Iāve had for months and months now.
To provide a bit more background, my issue started as getting no sound out of my unit. I had to restart multiple times, sometimes up to 10 times, before I could get sound.
After a bit of research, I found that multiple users had similar issue (if you search this forum or even Google for āno sound from QCā youāll come up with a number of hits)
There were multiple solutions, for example start the QC with nothing plugged in, or spray contact cleaner in to the I/O jacks. Regardless of the fact that you really shouldnāt have to do either of these, to get the QC to work, these fixes seem to be only temporary.
As this link explains, I nearly had to cancel a gig last week because of this - which is absolutely not cool;
As it happens I had been emailing NDSP Support for a few days before that gig, and one of the things they asked me was āis there any signal showing on the I/O page, when there is nothing plugged inā?
And the answer was yes, exactly like your video shows.
Interestingly as soon as I replied to say that yes, the I/O page shows multiple inputs are showing as clipping even with nothing plugged in, they immediately told me to return the QC to them for repair.
Luckily it is still under warranty (good thing the warranty is 3 years, as Iāve had it 2 years and 7 months) but oddly IMHO, their policy is that even for a warranty repair, you have to pay the cost of returning it (to Finland! Which canāt be cheap) Luckily again however I contacted the people I bought it from (the famous Andertons Music store here in the UK, youāll have seen their videos on YT Iām sure) and they said they would arrange collection from my house and also arrange to ship it back to NDSP.
It only left a couple of days ago so I canāt tell you how long it will take etc, but it might be best to get yours off for repair tooā¦
1 Like
See this
Hey mate, if you live in the UK you are protected by the Consumer Rights Act - meaning that the manufacturer is responsible for costs associated with warranty repairs. I would state this to Neural and insist that they cover all shipping fees. A warranty policy cannot supersede government law - and they say it themselves in their policy:
"The interpretation and enforcement of these terms and conditions shall be governed by the laws of FINLAND. In cases of warranty claims where local law or statute stipulates minimum terms or coverage found to supersede, prohibit, or otherwise conflict with any term(s) or condition(s) of this Limited Warranty, Neural DSP Technologies shall comply with those terms, conditions or requirements as set forth in said law or statute. "
8) Whether or not the consumer has a duty to return the rejected goods, the trader
must bear any reasonable costs of returning them, other than any costs
incurred by the consumer in returning the goods in person to the place where
the consumer took physical possession of them
After sitting unplugged while I was at work for the day, my QC just started working correctly when I got home and plugged it in. I had tried unplugging it and recycling the power multiple times in the morning to no effect, but for some reason it just started working again.
I think mine was related to a very short power loss (~1s) the night before at my house. I have it hooked into a surge protector, but I think the rapid loos of power with the immediate return of power was not to its liking. (I usually leave my QC in Standby.) Iāve had others tell me theyāve seen this happen in such situations. Iāve started turning my QC completely off more.
Iām sorry that yourās has been a recurring issue. Makes me concerned that mine might start acting up like this more often. I agree that if its under warranty and a device defect then the cost of shipping should be included.
Good luck - let me know how things turn out with your repair.
-David.
Thanks David, I will do, and likewise.
Neural were certainly very quick to tell me to send it back once they ascertained that the I/Oās were showing clipping with nothing plugged in, which indicates that itās a known problem to them (it was Neural that also asked me if the I/Os were doing this, I didnāt offer that information)
Thatās interesting, thank you. As it happens Iām ok as Andertons have sorted everything so far, but thatās helpful to know for future referenceā¦
So this is a known Hardware issue and canāt actually be patched?
Iāve might send mine back to thomann to make use of my warranty after the next gig in 2 weeks.
Edit:
Iāve opened a RMA at Thomann and will send my QC to them in 2 Weeks after my next show.
I really love my QC so i hope if they āfixā it or send me another unit, this wonāt happen again.
But itās a work device for me. So if this happens again, iāll might consider getting another brand 
Unfortunately, I personally know several dozen people who have experienced this.
Itās a hardware error on the I/O (input/output) board.
Itās a very common error on the PCB.
Itās a random error, and thereās ONLY one solution: send it to Neural via RMA and have them replace the board. It happened to me too, and so did several of my friends.
1 Like
Ew okay thanks for that info! Do you know if ānewerā produced QCs have this issue too?
If thomann just send me another one, which has the same board, it would be annoying having to resend everything again.
Thereās no way for anyone to know if the new version of the QC would have that since they arenāt even available yet haha