(I get this question all the time). The Service Switch works, and no modifications are needed.
No External remotes required, change games by holding P1 and P2 Start buttons, or use 1 or 2 other buttons of your choice - Supports 5 button inputs per player - Connect up to 6 JAMMA boards - Only 1 JAMMA board is powered at a time - Supports up to 20 Amps on 5V supply, much higher than other switchers. Disable any unused ports by toggling a dip switch, and the switcher will skip past them. Save State - upon powerup, it begins with the last active gameboard. Designed by RiddledTV, in the USA!The item "Jamma Arcade Switcher 6Way, 6 in 1 No Remotes Needed" is in sale since Sunday, March 28, 2021. This item is in the category "Collectibles\Arcade, Jukeboxes & Pinball\Arcade Gaming\Replacement Parts". The seller is "riddledtv" and is located in Overland Park, Kansas. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Switzerland, Norway, Ukraine, Croatia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.com