Have Roland cube amp that power up but nothing else works..just stopped.is there a fuse and how to change

1. Check the power cable and ensure it is securely connected to both the amp and the power outlet. 2. Check the fuse and replace it if needed. 3. Check the power switch and ensure it is in the correct position. 4. Check the battery (if applicable) and replace it if needed. 5. If the amp is still not turning on, contact Roland customer service for further assistance.

Your Roland microcube AC is waste up

Unfortunatly the impact from a fall can lead to numerous problems ranging from a broken fuse to a disloged power supply to a cracked board. I'd suggest taking it into your nearest Roland authourized service center to get it checked out. If you're not trained in electronics you can do more harm than good poking around inside the amp. https://www.roland.com/us/support/service_repair/service_centers

Most likely the acid ate the internal power supply, but if you can dis-assemble it and clean any trace of gunk with a toothbrush and electronic cleaner, including the fuse and it's contacts, maybe you'll get lucky.

Yes, there are adapters available.

What part of it got wet will determine the course of action.

If the whole unit were submerged, the unit may prove more time consuming to try to fix than to locate a used one. However, I have salvaged imersed laptops before. the procedure is not much different- make sure the unit is as dry as you can possibly make by blowing a fan on it for an extended period of time.- Days.

Once dried, use some contact cleaner on the jack contacts and interupts, any manual control and any switch.

You can then apply power. If nothing lights up, check and replace fuses as needed. Also check the power supply board for failed caps or rectifiers.

Once the power supply is known to be functional, systematically check the LCD display and the aspects of the amp that it controls. This board will be the most vulnerable and most likely to be the source of most issues you will encountr.

If the display survived intact, and amp does nto work, apply a signal to the inputs and trace the signal through the amp with a set of headphones set up with test prods. The problem will be where the signal stops.

have a look here:
http://www.ehow.com/how_8698510_fix-roland-cube.html

although it doesn't mention the fuse you will probably find it. Sometimes there is a fuse access on the outer case.

Check the fuses. There is probably one on the outside of the amp and some inside the circuit board.

Thee internal fuse should have protected it.

Here is schematic:

http://elektrotanya.com/roland_cube-20_combo_sch.gif/download.html

Scroll down on page and click on "Get Manual"