Question about Yamaha Full-Size Keyboard
After the 5th day I am in the following situation: After powering it on, only the display is working. No panel buttons interact, no leds above keys slide to L/R sides and back to center and keyboard does not produce any sound, although holding the last key down (C) and powering it on, starts initialization. Where should be the problem? At the speakers? At any capacitor? In the power supply cable? THX
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Posted on Jan 02, 2017
SOURCE: Firmware update failed RD-XS34Su
If it was a toshiba supplied disk, then I should follow up with them with the failure, as it was their fix, that caused this problem, they should replace/repair this unit for you
Posted on Oct 15, 2007
Without looking at the schematics for this particular model, I'd surmise that the click is indeed a speaker protection relay. Generally this is fed by a number of different sense circuits that watch for power amp issues and/or excess speaker current and/or power supply output stability. Although the relays do indeed fail at times, generally it is not the relay that is at fault. If you have a scope and a schematic, you can check the various circuits that feed the relay for the exact cause. If not, you can do some experiments that might help deduce the problem: e.g. do headphones work when speakers do not, does the relay click on when no speakers are connected (or selected), etc. In my experience, it is most often the output transistor(s) in the power amp. But not always ;-)
Posted on Oct 15, 2008
SOURCE: MacBook won't start up.
If you have your Mac OS X Install disc, insert it into the drive.
Restart the computer and hold down "C" while booting.
Choose your language.
Select "Disk Utility" from the "Utilities" in the menu bar.
Select your Macbook's hard drive in the left sidebar.
Click the "First Aid" tab thats along the top of the viewer window.
Click "Verify Disk" (not verify disk permissions)
If this shows errors click "Repair Disk"
Once completed close the Disk Utility window.
Restart the computer.
If this fails to fix it as well then your next option would most likely be recovering your files from the macbook either by booting into target disk mode (hold down T at startup) and transferring them via a firewire cable, or removing the hard drive and hooking it up to another Mac to get the files. Then do a clean install of Mac OS X using your installation discs.
Posted on Feb 15, 2010
I had the same problem. all the service reset would only make the display come on for a few second with no "k" on the screen - only the channel would show up. I purchased a complete set of board for the lcd on ebay, and started swapping them one by one. The inverter boards were the culpret. Tele working 100% since that board swap.
Posted on Apr 08, 2011
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