Pinbot LED Conversion Flasher
Recently upgraded my Williams Flash & Pinbot and had issues with Flasher bulbs they either stay on or wont work due to warming resistor on old filement so posting this fix.
This is a resistor board, the outside smaller resistors are the warming resistors which allows a small amount of current to flow thru the bulbs to make them light quicker like a flash. When using leds this small current is enough to light the bulb when they should be off. As others have said the resistors can be removed or the black wire on the board can be removed.