Looking at the main larger board, there is a surface mount component labelled "U11". The part number of this component is L78M05ABV, but marked as "78M05". You can look this up on google so you know what to look for. Using your meter set to Ohms, read from the tab to Pin3.
If the tab is facing away from you, pin 3 is to the right. The polarity of your leads does not matter. If your measurement reads less than 100ohms, it is not repairable. This symptom is a result of the main MCU IC being blown from a blown output. The main MCU has software on it and I do not have the software in order to reprogram a new IC to install/replace.
Feel free to contact me if you need additional help in performing this test. There will be no other charges at all. All customer units are logged in my system with their model and serial number from the side of the housing. Please do not open up or attempt to repair your unit.
The item "Repair Service For Graco Board 243660 244232 UltraMax 1595 Mark V 6-Mon Warr" is in sale since Wednesday, October 23, 2019. This item is in the category "Specialty Services\Restoration & Repair\Electronics". The seller is "healthandfitnessrepair" and is located in Drumore, Pennsylvania. This item can be shipped worldwide.