Hp indigo 5000 print normal than start losing color

Hello my indigo 5000 start normal and pass the full color calibration after start printing by 150 sheets the machine loose the color and start printing very light or big light cmyk band showing in any print
The only issue I have for long time is I had to bypass all scortron voltage to make the machine print but it never infect the quality like now
I swap the SCU from older machine still the same I changed the pip still the same any idea guys will be great
Her attached some sample showing the color and densi change

 

I think I read your post on facebook today earlier...
-When you swap SCU the problem stays in the same scorotron or changes to another one?
-Check the high voltage wires connected at the rear of your scorotrons that they're not loose, usually they may break because of the movement when the scorotron bridge go up and down
- I haven't operated a 5000 but can you look for the Diagnostics>Scorotrons window? It would be nice if you share us a screenshot with the Grid and Corona activated so we can see how are your scorotrons working currently. WITH THE PRESS NOT PRINTING

They should look like the ones below (the left and center ones)

 

Here is the the pictures how they looks Note no center svorotron is in place all buypassed

 

Are you currently working with 2 scorotrons?

At the moment it seems your left scorotron is not working properly, the right one looks "ok", I'm going lunch right now, I'll be back later, btw you may take a look at your left scorotron, specially the high voltage wires at the back of your press?

 

no center scorotron ,i checked the wire they seem ok , am going to keep checking

 

OK, inspect them carefully. Black ones corona related and red ones grid related. It would be nice if you take a time after this to swap the left scorotron SCU with another one and do the same process of taking a picture of the Grid/Corona window to see if voltage stays the same or switches position,

 

Could it be the electrometer in need of calibrate?