I have the Pioneer SD-533HD5 53" HDTV and my wife's cousin was trying to get the tv switched to another input by pushing buttons on the front of the tv. Some how she managed to get input3 to go black and white. I have tried to adjust the settings, but everything appears to be in the "normal" range, temp, color, tint etc.... If you switch to Input 1, 2 or 4 the color is back. I am lost as far as what to do. any help would be greatly appreciated.
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ManualsLib has the manual for the SD-533HD5 here: https://www.manualslib.com/manual/384249/Pioneer-Sd-643hd5.html . (The manual covers two models.) Once you modify the picture parameters (starting from STD, REF THEATER, GAME), these are stored as the User mode. If you press Menu when done changing the parameters, that input should maintain the User settings for the last setting until you change the Picture type. If you modified the parameters for STD and then return to that input and change the Picture to GAME, any modifications to the GAME picture parameters will become the new User Mode. See page 50 of the manual for the details: https://www.manualslib.com/manual/384249/Pioneer-Sd-643hd5.html?page=50#manual .
Try pressing the "Input" button the front of the set. That should allow you to change between the different inputs. The return button usually returns you to the previous channel you were watching - don't think it works for the input though. Also, depending on the model of the set you have, try downloading the PDF user or owners manual - it will tell you how to use the remote.
its the problem of the ics on the main power supply board
Do the IC heat sinks get warm??
If they do not, check fuses F852 - 2AMP, F853 - 1.25AMP, F850 & F851 - ALL 5AMP on the power deflection pcb. THESE ARE NOT GLASS FUSES. They are usually about the size of a 1 watt resistor and either green or orange in color. They are soldered in. The nomenclature is printed on the component side of the board. They are all about centered on the opposite edge of the PCB as the high voltage transformer.
If you have cleaned up the mess you describe you most likely have one of these fuses blown.
if dont have any technical knowledge its advisable to call a technician as it is worth getting it fixed.