Beakybird:

I'd put my money on Gary's explanation and solution. The only other thing I can think of might be the mainboard with hairline cracks. Difficult to find and nearly impossible to repair. I would check out Gary's approach first before scrapping anything.

Quality control problems are not unique to Yamaha. Just remember the brand new car somebody bought recently that was assembled on Friday (or was it Hangover Monday?)and had such a host of problems.

Please keep us posted about the final analysis and solution. Who knows, my old 2000 may be next.

Thanks and good luck.

Dave Rice http://cdbaby.com/cd/daverice

As far as hairline cracks in the board, I once had a Rotoverb that stopped working and my technician xrayed the board. He found a hairline crack and was able to solder in a connection. It worked fine after that.

Unfortunately, the suggestions on this forum do not apply. As I have mentioned, the techs at Yamaha in California and my tech here in Illinois cannot figure out what is wrong with the keyboard. Maybe he could if it was failing constantly, but the problem is intermittent.

It was failing constantly when I brought it to him. He sees the keyboard reset, but it hasn't done it since he opened up the keyboard. That's just my luck.

According to my tech, the keyboard is staying on, but it's resetting, and he cannot figure out why. He has tested the ribbon cables and has performed heat and tests on the main board to see if there is a hairline crack. He hasn't found anything.

I'm on week two without a keyboard with no end in sight. Maybe I'll have to buy another one.

Beakybird

Voltage drop or an arc [short] within the power supply.

I had a similar problem with another keyboard, that drove me crazy. I would try different outlets , but once or twice a night it would reboot..It turned out to be the power supply.

Did you ever get your keyboard fixed? What was the solution? I emailed you (reyguel Nious)to find out as well. I don't know if you received it. Let me know.

"and has performed heat and tests on the main board " --- when testing for cracks and intermittants on a circuit board it is much more effective to squirt a freezing agent on the board. Lowering the temperature makes everything shrink and will open a hairline crack in the copper traces or a crack in a solder joint. Comes in an aerosol can from Radio shack or other service oriented suppliers. Just squirt it on while the board is under power.
Walt

My repairman never found out the problem nor did he ever hear word from Yamaha as to whether they were able to fix the same problem on a keyboard that they had.

It is very intermittent. I originally had the problem at a show about 7 months ago. It repeated itself at home with a different power supply, and I brought it in. The repairman could not figure it out. He did use heat and cold to see if he could expose the problem.

Outside of the phenomenon repeating itself once again at home, it didn't happen again for about six months. I had left the keyboard on at home, and when I returned, the keyboard was going on and off repeatedly. So I brought it in and, again, the repairman and Yamaha cannot figure out what's going on. The main problem is that the problem will not repeat while it is at the repair center. My tech saw it occur once, but it would not reoccur while the keyboard was opened up.

So the keyboard is home now, and it is working fine - for now. I'm not very confident about it as a backup. I don't know what I'm going to do if I cannot get it fixed before it's time to sell it when the PSR3100 comes out.

Thanks for asking.

Beakybird

Hi,

I receivd your email response>Thanks for responding. Last Thursday I took my keyboard back to the repair shop and they put 2 small boxes under the side edges of my keyboard. Sure enough they saw the problem! Tey explained to me because of the "play" in the middle of the keyboard (under, that is) there is a lot of pressure in that section when using an "X" stand. It tends to bend inward. Most likely causing a small exposed crack on the circuit board. I know you said they checked the circuit board, but I believe they didn't do a good job looking. My tech wiggled the power adapter plug and It didn't reset. When you're playing on the keyboard, if you consistantly play hard or hit the keys hard you're going to eventually split the motherboard. I took my stand to them last Friday. I think they're going to find thw crack and repair it. If they can't find it, I'll have to purchase another motherboard for about 800.00. I'll let you know if they do or don't. Meanwhile,if there's another authorized dealer nearby(or within traveling distance) I'd give them a shot.

This is exciting news. Well $800 is not exciting news.

Tell me if they find the crack and if replacing the motherboard fixes the problem.

Beakybird