Crumar Musical Instruments User Group.

I was looking help to fix my BIT-99 (White), please let me know if 
any1 can help me. I will describe the problems :

- the first problem i see is the numeric display, when i turn on the 
synth a number 7 appear in the first numeric display (from right to 
left) then the number dissapear and start with the program number 1 
but the light intensity of the displays goes down after numeber 7 
dissapear. I already replaced the numeric displays with new ones and 
i replaced the BCD-to-Decimal Decoder IC. the problem still there.

- and the second problem is the sound, after i depress a key i hear a 
sustain note, and some programs hears awful. i alredy load the 
original programs. By the way, i have another Bit-99 working 100% and 
i compared the sounds and its totally different. I was thinking it 
could be the DAC0800 IC (8 bits DAC Converter)or a OP amp. the CEM 
seem to be fine. 

What do u think could be the problem ?

Thanks and greetings,