Hello, just wondering if anyone can assist me. My 300, use to correctly activate each player, based on the input from one player through to four.

Now, when activating two players (the coin slot had been reconnected to a "credit" button to press for player amounts/activation) the machine plays three players, however the 2 player light is shown, but when player two is finished, the machine goes to player number three, then repeats the cycle as a three person game.

As a newbie, I have not worked on the machine much, but I am game !

Thanks Howard, and also for the quick replay !

To clean the wipers and or the disk, how and what would you recommend? I am thinking of trying to clean first to, before trying to get into the electrical side of things.

This is a terrific idea Howard, and I thank you for the info on MarkG's site. I missed the deadline to participate in today's forum, but I signed up for future podcast. To be an observer for today's for clinic, does one still need an invite to watch only ? I understand to participate space is limited, but would be interested in observing the discussion. I may reach out to you on the weekend, if your available to chat about the machine and will send you a private message later today or tomorrow once I know my schedule. Cheers!

Thanks Jeffc, The coin stepper required a cleaning and then I lightly used a 400 grid paper over the contacts for each player, manually activating the plunger forward through, before resetting. They were grimy.

Now the credit button player selection says on the number of players selected. So two players remains that way after the second player completes each of their balls. There is also no longer a "6th ball" that would sometimes happen after the 5th ball of who plays last.

So far all is working great. Thanks for the video.

inside front (resized).JPGback (resized).JPGHello All, I wanted to see if any of you have experienced or have heard of, my most recent problem with my Gottlieb "300" ? While playing it, there became a noticeable humming noise (an increase in power/energy type of noise/with a hum/vibration) and slight vibration that could be felt under the palms of your hands in the playing position.

I turned the machine off, even unplugged it, waited, took the glass out and lifted up the playfield, to see and hear (in terms of the location of the electronic components effected, on either the bottom of the cabinet or the ones attached to the underside of the playfield) would happen when I plugged it in and turned it back on. So, when I turned the machine on the hum was there and the hum continued when the credit button was selected to a player/game start mode. The hum was from the bottom of the machine, seemed to be coming from the inside front area. Hard to pin point, as well, I felt the vibration come from the same palm/hand grip position/placement (front of cabinet) and the coin door was open and was vibrating (it seemed/felt like the noise was coming from the front).

Since it did not sound good, I went to press the power button off, and there was a noise sound, like the one when you score a free game (with either points or match). middle (resized).JPGI have not done anything else since that, as it sounded serious, beyond my knowledge (limited), hence the forum !

So, if any of you know of what may be the problem/solution or advice, I would appreciate it.

Thanks

Hi Classicpinballs, would you be able to expand on this, as I am very new to the pinball terminology. Where would these two places be in particular (as I originally believed that the noise was coming from the actual coin door and it was vibrating) and how would one check these areas for defect. If it were a relay on the coin door or power hold relay, I assume that new parts can be ordered ? But unsure as to how one can be sure if the area mentioned is a fault?

Hey All, I was wondering to clean contacts, for lights and other electric contact parts, would anyone recommend "Deoxit - contact cleaner" or another product to use to clean contacts ?

Thanks, good idea.