Psr s700 display has been changed colour blue then display is blinking what is the problem

Question edited for clarity. 'make model (what it is), first 3 words.

Here

https://www.fixya.com/support/t29944524-could_problem_psr_333_yamaha_keyboard

https://www.google.com/search?q=psr+333+yamaha+reset

....

lots of issues there
will need taking apart to find the faults and repair

some possibles
power source input low
internal circuity faults
switches
dry solder
diode faults
internal dust build up


One of Yamaha's new arranger keyboards, the PSR-S700 is the more entry-level model, but still comes with a range of impressive features:

• 61 touch responsive keys
• 96 notes of polyphony
• 5.7-inch QVGA LCD capable of lyrics and score display
• AWM (Advanced Wave Memory) sample sounds
• 813 preset voices made up from 317 voices, 16 drum kits, 480 XG voices
• 10 MegaVoices
• 11 Sweet! Voices
• 18 Cool! Voices
• 14 Live! Voices
• 9 Organ Flutes
• 2 layer voices
• Large number of preset and user-definable effects including reverb, chorus, 4 x DSP (Digital Signal Processing)
• 205 preset 8-part auto-accompaniment + user category with mixer controls
• 16 track recording
• 30,000 note capacity
• Performance assistance technology

Assuming this is a PSR-S700 then you need to undo all the screws under the keyboard and open up so you can see inside under the speaker grill. You will see the grill has tabs that poke through the casing and these are then twisted to keep it in place. Straighten these, push tab through casing going from side to side and then the grill will eventually work free. You do not want to do this too much as the tabs will eventually break with wear.

Press the last note (right side) while powering your s700 ,this will reset your settings.

Well first start by calling or emailing the manufacturer. They'll let you know who distributes their parts or If it's still available or not. But also could be a power supply problem.

It sounds like one of the OTS buttons is getting triggered accidentally. There may be a build up of residue behind the button. With the unit off, try rapidly pressing the OTS buttons, one at a time. This should help to move any debris which may be creating a false contact.

If you are feeling brave, you can try opening the keyboard and getting inside, under the button with some electrical contact cleaner such as DeOxit or Servisol.But be warned: it can be difficult to get the parts back together properly! So if you don't have much servicing experience, call your local music shop to find a service technician.

Likely a connection to the backlight is being broken. Tap on the unoit and see if it pops back on. Illuminate screen with a flashlight and see if the characters can be seen when screen is faded. If they can, then the backlight is the problem... IF NOT then the display may be bad... This has been a problem and if you are under warranty, excersise it immediately... else replacement of the display is relatively expensive.

You MAY be confusing touch sensitivity with VELOCITY sensing. Touch sensitivity is PRESSURE put on AFTER the note sounds that causes modulation. VELOCITY is what is used for example to control the loudness of pianoo notes depending how fast they are struck. VELOCITY sensing is done by using TWO contacts at every key... one closes first. IF one of these gets dirty, FULL velocity will be sensed and it will be LOUD. The contacts can be cleaned using ONLY 99% isoprophyl alcohol and Qtips after MUCH disassembly of the keyboard. The contacts are conductive rubber pills in silicone rubber domes. Clean boththe contacts and the circuit traces they pres down onto.

1. Try the volume

2. Your adapter may not be the proper voltage/amperage. If the adapter has ratings listed, make sure they match the keyboards ratings.

3. Try it with the headphones. If they work and the speakers don't, you've narrowed down your problem. There may be some damage or wiring problem within where the board meets the speakers, and/or before processing.

4. Try it with batteries. If that works, you need a new adapter.

http://www.ioffer.com/i/adaptor-cord-yamaha-psr-or700-s500-s700-s900-arranger-113553507

MR SATISH IF YOU WANT TO SOLVE THIS PROBLEM CONTACT:9887070565,94136768(ANAND NARWAL)FROM RAJPUTANA ENTERPRISES