YAMAHA PSR-E403 REPAIR(Low Audio Output) 

i have the same keyboard and exactly the same problem..I have bought the new one but now after watching your video going to get the old one repaired,..Thank you.. Hope it will solve my problem

Can you please share the specifications these 2capacitors

I have an old JVC KB-600 with a sound problem. It works when first switched on but then the sound drops quickly to a low scratchy sound.