Panasonic AG-EZ30 - missing reds after bump

have you looked in the manual? I think this is your manual online...
http://www.manualslib.com/manual/303254/Panasonic-Ag-Ez30.html?page=91#manual

well if it uses a tape mechanism .It will only have 3 motors .LOADING, CAPSTAN and HEADS.If one of these is running without tape ,you should get an error of somekind of your screen .If there is no error from mech then noise is possibly an electrical whine from the LCD panel power supply and or main camera power supply .

This is usually caused by a failed component in the moisture detection circuitry within the camera. This will require disassembling the camera to remove the tape mechanism and then replacing the defective component, reassembly and calibration if necessary. This can be repaired fairly inexpensively. However, it's not a user serviceable problem and will need to be repaired qualified service technician.

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• Like all the old video recorders there are mechanical parts inside what need cleaning in high priority the parts that mechanical activate switches for the intake in the little microcontactsswitches and the most important of all are mechanical mode-select-switches where timing is an hot issue
  
• The entire process is timed often gears are used, but sometimes also strings that can slip by age and or dirt, cleaning and contact cleaner and look for bad soldering.
• Also check that the lens motor for the aperture setting is working properly, because everything concerns mechanical settings when that failure then stops the device.
  Also the zoom lens motor that are the first mechanical parts after the tape was lace in. all must exactly done in a special short timing.
• 
  

PANASONIC AG DVC7 SCH Service Manual free download schematics eeprom...

Please write in English and help me to give your answer

Either learn Italian, or download an English language manual.

check the main board for bad solder connections near the power connection.

sounds like a loss of luminance -- check the analog yc pack for bad capacitors.

this problem is caused by defective power and record start/stop switches. they are still available from Panasonic.

most likely problem is a dirty or defective mode switch. this switch tells the internal computer what position the mechanism is in. if the switch is bad, the computer is "confused."