ROLAND GR30 POWERS UP BUT DOES NOT MAKE A SOUND

Contact Roland directly. Speak to their customer service department in your country. I beleive this is the info-
http://www.dealerlocations.in/roland-dealers-in-kolkata
If it's just a parts availablitiy problem, remember that Roland is a world wide company. Contact Roland in other markets, starting close to you and expanding out. Somebody will have it. I'm in the USA and often source parts from Canada, for instance.
If the instrument is truely dead, you can always sell it for parts to other users. Ebay would be a good option.

PDF]BOSS ME-70 Training Guide - Roland

cdn.roland.com/assets/media/pdf/ME-70_Training_Guide.pdf

AC adaptor. • $418.50 List, $299 MAP ... Connect the ME-70 to power using a BOSSPSA-120S AC Adaptor. 4. Plug a guitar into the ... For illustration only ). 4. Press the ...1. Turn the MODULATION TYPE knob to select a Modulation effect. Do not ... 2. Pressboth pedals down again or press EXIT to return to Manual Mode.Missing: han ‎dots

ME-25 Guitar Multiple Effects Review ' Boss ' Guitar Effects ...

https://www.ultimate-guitar.com/.../boss/me-25_...

Ultimate Guitar Archive
Rating: 8.6/10 - ‎135 votes
Sep 16, 2015 - Overall the effects are very very full sounding and don't sound too digital by any means. ... With 2 selector pedals, up and down, its a pain in the ? ... Editing the patch is as simple as press 2 buttons at the same time and turning ... If this was stolen I would probably get the ME-70 just because it pretty much ...

Tom Scholz's Guitar Sound - Van Halen Links.com

A Gk3 cannot be connected directly to an electric piano or synthesiser. The 23 pin DIN connector connects the GK3 / GUITAR to a Roland guitar synthesiser which produces the synth tones . This unit can be connected via midi cable to any external keyboard or synthesiser...to produce different or varied tones from the external synth ........provided the devices are able to communicate with each other...see the midi implementation charts for each device for information....

You cannot connect a Gk3 directly to an electric piano or synth. What you have to do is connect the 13 pin DIN connecting cable from the gk3 to the input on a Roland guitar synth unit like GR 20 or the GR 55 which supplies the desired instrument tones as required. The synth can be connected via 5 pin midi cable to an external synth to provide further tones...I personally have never used a keyboard to provide extra tones because I am a guitarist so only used synth modules and not keyboard ....remember also you need an amp or pa system to hear the sound output from the guitar synth module or external module.

If you mean it's completely dead, no lights or anything, then probably the fuse is blown. The question then becomes"what caused the fuse tio blow?".
If however, by loss of power you mean it's quiter but still producing sound, then the fuse is not blown.

You must connect a short jack cable between the GK2 or GK3 and you normal guitar jack out. Secondly, the switch on the GK should be in the middle, that will give synth & dry guitar simultaneously.

Two things come to mind: 1. These synths have mute and output control settings. Verify they are correct as even a factory reset might not set them to default. 2. The next thing is that the volume control itself is damaged which requires internal investigation. Was this working and was there an accident with it... dropping manhandling, or accident with power or cables? There could be a cable that has fallen off between the main board and where the audio outs and jacks are. Be very careful if you open this of ribbon cables from the halves of the shell.

I would expect there is bad soldering or a circuit board crack. Inspect the soldering aound the leads, especially pots and heavy components. Finding all the retaining screws can be frustrating. Expect the screws for the handle to also attach to the amp chasis. They are often hiodden under plastic caps.

www.rangeraudio.com has a good selection of manuals.

Okay, maybe this is rude, but TOTALLY ignore Musicaldude's solution, if you haven't already found out the ugly way. Boosting the signal that goes into the KP will just make the input LED light up red and you'll hear digital clipping [gross] and eventually hit a ceiling of all-crappy-staticy-noise and no real guitar left. Having it in the FX loop, and the Headphone-out workaround are smart moves already, except the Headphone out adds noticeable noise/hum vs the usual outs. But to help close the gap between your guitar's volume and the miniKP's internal synths (and program 63 and 65's feedback noizes, which build up even louder than the synths) unplug one of the RCA plugs from the KP's OUTput, pick one, left or right, whichever. You'll notice this gives you a guitar volume boost. BUT its still not enough...the synths and 63 and 65's feedback are still speaker-blowingly loud. Check the manual, it says you can adjust the wet/dry volume by holding down Tempo and Preset A together, then turning the knob and picking 1 thru 99. Make sure you're on the synth setting you want to use already. Do this thing. Play the synth with your finger, while you lower the number with that knob. Stay around 50 if you've got the one RCA plug dangling, around 20 if both are in. Whatever you think matches your usual playing volume. When its where you like it, hold the A or B button (wherever you want to save this) down and click Hold, this will save it onto that preset button. Now from now on, NEVER use 63, 65, or the synths if you're on whatever preset you DIDN'T just save. i.e. If you chose preset B, from now on you can just tap preset B and it remembers your volume adjustment from before, voila, normal-volume touchpad synth. But go back to preset A for every other effect, or you'll barely be able to hear the FX. KORG should've given us more preset buttons to save onto. Godspeed. I've never seen this site before, but I have this pedal, and experienced the same b.s. myself. Now I'm down to one preset button and quick knob-turning. Whee.