Yamaha PSR70 Keyboard low sound

Hi; guys i got this Yamaha keybord that i found in the trush,it has good sound in both speakers but the only drawback is that the sound is very low dispite the volume is in the max.
it's kinda strange i know this is a old PSR70 the two speakers are 3w 4ohms ony but still no faut like hum nothing just too low,it has a power amp ic LA4598 which is discontinued.i dout this ic is bad checked all ellectrolitics all fine unless a resistor or some Myllar cap what you guys think. Thanks in advance.

Hmmmm perhaps the capacitors need be replaced?

Jeffie wrote:

Hmmmm perhaps the capacitors need be replaced?

Thanks but i checked all caps with an ESR Tester and all seem good.
as i was checking and tried the HeadPhones/AUX Output and there is none not even a whisper,besides the IC itself what you think might be bad? i don't want to spend any money on this one because i have a good keyboard,if i find an LA4598 IC from other 2 channel amp receiver on the scrap fine ,if no just trash it.

I am out of wits. Perhaps contacting Yamaha's customer department will help?

Yamaha Corporation of America
6600 Orangethorpe Ave
Buena Park, CA 90620

Phone: 1-866-211-9366, Please call Monday – Friday, between 8:30AM – 12:00 PM