I guess if you are convinced the problem is hardware failure then you should find alternative service station.  Click on contact us link at bottom of page.

Alternatively you could flash the unit with newer firmware.  It does require access to a v75 as the interface.

I'm still not certain that you have ruled out local interference.  I would still like to hear the results of running on high power and at a different venue.  With the transmitter turned off do you see red LEDs on any/all channels?

The advantage that a V75/55 or G90 would give you would be the ability to add paddle antennas which would add to reliability. Also their is a small range improvement with them.  Aside from that all units should be nearly identical in performance if they were all operating in similar conditions

What about the LEDs beeing off? What about the fee Thomann is asking for FW upgrade, is it legit? What about the -82dBm signal?

Can you please explain if the unit is not broken what can cause the dropout and the need to power them off and on to get the signal back? If that something is causing dropout than why is the unit resyncing after a power off/on cycle?

I'm sorry ... I was not understanding that what you are experiencing is a power on/off cycle.  If that's the case I would try to rule out a problem with battery size (this happens with rechargables frequently) or that the battery terminals have become damaged or bent.

It is also possible that certain kinds of interference (dropouts) can cause the units to re-sync and if that is the case there are some firmware improvements that could be beneficial in some cases.  As far as an upgrade fee, we also charge for that service in the US as it takes a certain amount of bench repair time and there are shipping fees involved.

Its difficult to guess across the internet without having actual access to the gear.

"If that's the case I would try to rule out a problem with battery size (this happens with rechargables frequently) or that the battery terminals have become damaged or bent."

I have to power cycle the reciever also several times to get the units to sync. Sometimes 1 cycle is OK, sometimes up to ~10 is needed.

Since the first time sync problem appeared I changed more than 40 batteries (never used rechargables). I use the exact same type of batteries from the beginning. 2 years they were the right size?

I read/program PLCC, QFP, TQPF, SOP, PSOP, DIP processors, flash and eeprom memories almost on daily basis. I think I can spot a contact problem. Believe me or not, it's not the case, checked it already. If it was the case I would not see anything on the sender's display, right? Or if it is a very short problem of power supply on the sender, I should see the sender rebooting. Not the case, checked.

I have to ask it again... Do you really think a -82dBm or lower signal can cause interference to the Relay G50? Does the LEDs beeing off telling you anything? They are telling me that no recievable signal is present at the selected channel or the reciever is unable to recieve a signal at that channel... or both. Am I wrong here?

BTW, can I have the flash file so I can update the FW myself? Is the FW stored in MCU or Flash?

OH!!! I forgot to tell you some very important thing!!! After the dropout occurs, all LEDs are going off and then the battery meter comes back showing the status of the batteries from the sender. How is this possible if the sender and receiver is not synced???

I remember one time dropout occured we took a break and went out for a smoke. I left the units on, when we were back they were just as I left them, unsynced. This is the biggest time period I can recall. Of course I had to switch off and on the units.

I still wonder how can you exlpain the reciver shows the battery status but signal strength LEDs ar off?

Thomann has both the receiver and the sender, they told me they sent them to an authorized Line6 repair center. The response from this repair sender was: "As you can see on the forum these kind of problems are conditioned by the environment they are used in. Also on the forum you can see other kind of problems described. The system was tested here for a long period of time under praxis conditions, the problems were not confirmed."

I told Thomann also that it can pass a week without any issue and the next rehearsal dropouts every 15-30 minutes. I doubt Thomann (or whoever else) tested as much as I did. I have 4 rehearsals a week, usually 2 hours/rehearsal. That's 8 hours of playing that can go by without any issue. I have dropout isses for 7 months now, I tested whatever tests I could come up with. Changed 220V connectors, changed power modes, changed channels, I saw dropouts with fresh batteries also, checked the power plug that goes into the reciever. BTW, all of our gear is powered trough a power stabilizer with servo motor. I keep my eyes on the output power, it is solid 220V regardless of the input voltage. I know it should not be an issue, the power source of the Line6 Relay G50 is a switching power supply.

My unit is still under warranty, I am without it for a month now. If I send it to you it would take a very long time to make the roundtrip and get it repaired/replaced/whatever. This forces me to buy another unit even if I already own one, even if it is under warranty. I need the wireless system, that's why I bought it!

I asked Thomann what if I buy another unit and it will work flawlessly "under the same circumstances". Guess what! No answer to that!

You are the maker of the unit, Thoman is only a reseller, I am only an unhappy customer (even if I own several other Line6 products). Who's the only one that looses anything? I guess it's me. Why? Because I am little, law of the jungle.

"The unanswered question is why did it appear to work correctly when on the test bench at Thomann?  What is different?  I suspect that when that question is answered then the problem can be corrected"

The other question is why does it appear to work correctly for a week or so for me and than fails and than working again for a week and so on? Who's the one that has to answer to these questions? Line6, Thomann, me?

"The battery indication simply doesnt change because it doesn't update." - sounds like a firmware bug. No signal but battery level is indicated... So I cannot trust the battery indicator at shows? Nice!

"The fact that it works sometimes and then some weeks it doesn't would seem to indicate that either the hardware has an intermittent problem or that the local conditions change.  This is also consistant with the fact that it worked well for a long time and then changed.  That would seem to rule out any firmware issues."

Are you telling me that for two years I never encountered bad local conditions wherever I went and for 7 months I encounter ONLY bad local conditions ??? Suddenly everyone has high power devices at 2.4GHz and they only power it on when I use my Relay G50? Can I be more unlucky than that?

During those 7 months I made another test, I used the receiver  near my WiFi router. Right near the router I had signal strength problems (showing only 2 of 3 LEDs) but no dropouts, at 1~2 meters no signal problems, no dropouts. The signal is -22dBm at 50cm from the router and -30dBm at 1 meter. Both units were on channel 1 at the time of the tests. If it was not a bad environment for the Relay G50 than I cannot imagine what is! For me it is just a proof that your system is a good one but only when it works, when no HW failure or whatever else that might be the issue with my unit.

"Again we would be happy to test and measure it but we would have to get it back to do that." Can you arrange that with Thomann or that specific authorized Line6 service they are referring to? Do I have to do that? I am afraid the expences and the time consumed to get to the USA and back not worth it. I have to mention again that my unit is still under warranty. Based on European laws I do not have to pay to send my unit for repair under warranty period.

OK, I will order a new G50, I will have my questionable G50 back, I will make measurements during rehearsal. Should I also record a video of the issue while I play?

How close can two recievers be? I am asking it because I want to record both of them. I am not sure I will be able to record my laptop's screen, the two receivers and still play the guitar. But hey, these days a musician has to be an engineer and a magician also!   Maybe I will learn to write my name on the carpet with my left foot in the same time too... LOL  ...or do the "moonwalk".

I can go through five rehearsals with one set of batteries. This was from the beginning, it didn't change. I use Varta High Energy.