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Display light not working - Roland Boss DR 880 Dr Rhythm Drum Machine

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I have a Technics PR-305 Digital Piano. I had a couple of guys come out to see if they could fix it. Only the LCD display and the front light worked. It must be the power supply.


Technics, digital piano, keyboard repairs, repair, service ...

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technics, technic, tecnic, digital piano repair, service, servicing, digital, electronic, ... pr200, pr250, pr270, pr3, pr300, pr303, pr305, pr307, pr350, pr370, pr40, pr5, pr50, ... It needs extremely specialised repair work which must only be carried out by .... nodisplay, LEDS don't light up (except for the one on the front of the piano ...

Dec 18, 2015 | Music

1 Answer

How do I fix a Roland Digital Piano FP-8 that has refused to play sounds despite the fact that it displays lights?


If everything lights up and responds to button pushes like normal, and you've done a hard reset as described in the manual, check to see if you have sound out of the headphone jack. It's most likely not a user serviceable problem and will need to go to the shop, but it will probably be the output amp rather than the main board.

Mar 07, 2015 | Roland Fp-8 Digital Piano Email Us For A...

1 Answer

Senpera 2 when plugged into amp lights up but no display screen shows


Contact Peavey toll free at 877-732-8391 or by email at customerservice@peavey.com,

Dec 31, 2014 | Peavey Electronics Peavey Sanpera 2

1 Answer

Keyboard display


try resoldering the flat cable on thescreen

Sep 22, 2014 | Yamaha Corporation Of America 88 Key...

1 Answer

There are glitches on the display of the console, and the faders aren't working properly, some assigning themselves to the wrong lights and some not even working at all.


The first thing to check is if you have reasonable length lines to the lights you SHOULD HAVE A TERMINATOR resistor at the ends. Without this, data reflections can corrupt the data stream and give WILD results.

Here is a link discussing the need: http://www.controlbooth.com/forums/lighting-electrics/5229-dmx-termination-dummies.html

Feb 11, 2011 | Behringer Eurolight Lc2412 24channel...

1 Answer

Effects Panel


If other lights are on, I have seen a case where the display does not light for a time, especially if it is cold. The gas in the display takes some time to light up like some neon bulbs... the effects should still work, you just can't see the display. Usually the display will eventually come on after a few minutes after being off for long periods. Sometimes one can encourage the display by external radiation such as a cell phone in close proximity.

See if the FX input indicator is functioning.

If the electronics of the DSP/FX is dead, troubleshooting it is not a DIY unless you have special test equipment. The unit uses two 57002 DSP's controlled by an 80C32 micorprocessor. Beyond checking that the 80C32 is operating and busses have activity, you probably won't be able to do any fruitfull troubleshooting

If NO lights come on in this unit, then the power supply has fried and you don't want that as it is likely caused by the rear power amp arcing out.. Lots of work to repair. Since rest is working this is not the case with yours. ALWAYS be careful to insure speaker leads are solid with this amp as an intermitent lead can blow this amp easily.

Behringer does not release their schematics to non-agents...

Jul 17, 2010 | Behringer Europower Pmp5000 Powered Mixer...

1 Answer

I have the boss BR-900CD and everything seems to work fine but nothing shows up on the screen. It lights up but no data shows up. Thanks


Hello,

the problem is from the display IC of your unit. You nee to change the display IC for your unit to display again.

If you cannot do it yourself, maybe you should consult an expert to help you have it fixed.

Good luck.

May 13, 2010 | Music

1 Answer

Top console is not working on Pro 1000 Dual Scratching CD Player


Check controller cable between base and remote. Look for bent pins. If appears ok, you may have an internal loose connection. Try and narrow down if loose section is on base or remote. You could have it resoldered if needed. digitalrepair@hotmail.com

Apr 21, 2010 | American Audio Dcd Pro 1000 Dual...

1 Answer

I HAVE THE BOSS BR-900CD AND EVERYTHING SEEMS TO WORK FINE BUT NOTHING SHOWS UP ON THE SCREEN. IT LIGHTS UP BUT NO DATA SHOWS UP. THANKS


If all other controls are working, check IF they have a "Contrast" setting for the display. When those are at end of range, the display often is blank.

Mar 21, 2010 | Boss Music

1 Answer

No display light on my casio ctk 496 every thing else works


Sorry, but many of the low end keyboards do NOT have backlights. This is especially true of those that have the capability of running off batteries like the CTK-496.

The display in this is a reflectance type that needs ambient lighting to view.

Mar 13, 2010 | Casio Ctk 496 Electronic Keyboard with 61...

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