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I'm helping a friend remotely so I haven't inspected the monitor personally yet, I just told him try to tweak the pots to see if anything changes but that won't help, maybe bad pot/solder? or what else could have gone bad? stuck transistor for the green? looks like blue and red are present.

One day I turned it on and I got an horizontal line in the middle of the screen. Currently I've replaced capacitors (C431, C432, C433), resistors (R433, R436) and two D1138 transistors...and all was ineffective. Where would I be looking next?

nanao dual 8 (ms-8 25") screen size flickering never seen this problem before, worked fine yesterday...today goes like that https://youtu.be/sXrGC7WoIyg https://youtu.be/b6E0Srj-58w size is unstable both vertical and horizontal recap didnt help could it be an IC failing? any help very welcome

any idea where to start? https://www.youtube.com/watch?v=DKm42uCjHvM

I need original TV from the game or General Electric Adventurer II wich I can modify and I am after the whole wiring harness for the two player CS (green) any other part would be interesting

or similar, eventually if the colour is different I can buy the replacement shell here http://groovygamegear.com/webstore/index.php?main_page=product_info&products_id=327

http://youtu.be/gyYv2C6mFwk +5 is fine ideas? there a relay near the psu that keeps clicking

I was thinking, what's the highest watt for an arcade speaker used for 80s pcbs? for example, can I use two 4 ohm/40 watt (wired in series) on a jamma cab or do I risk something like baking the amp or worse?

a friend has this problem, both rows constantly showing a zero or a full digit on the far right (sometimes left) I am going there soon to measure voltages and check bad connections etc in the meantime some heads-up would be great thanks in advance here's the pic

I touched the solders of the chip with the large heat sink and it's completely silent, also baked as you can see from the pic. so I'm tempted to try and replace that before further investigation but I don't know what that is, anybody knows?

removed all connectors (except J101..) and F114 blows the instant I switch on. it's an 8A for the +18 volt = lamp matrix could it be related to BR2? also, none of the switches on the coin door and start button are working.

after 7th blink it plays the normal sound and then freezes there, no digits on the display, lights stuck on and small coil on the coin door is constantly energized http://www.youtube.com/watch?v=qivuPJfLeYo&feature=youtu.be if I use roms u1 u2 from another game (750?) it works and I can coin...

even a bootleg willl do

just got a brand new dual frequency chassis for super sprint, I tested the new chassis with normal 15KHz games and it works correctly. put it in the game and syncs to 25KHz but it's impossible to stop vertical scrolling, I can slow it down but just won't hold it. I also see some horizontal...

I am having a problem with two nanao MS2930 chassis, I am testing them on a naomi tube (2934s / A68KSM696X) which I am not sure it's 100% comptible anyway I get a good 15khz picture with normal jamma games but when I connect the vga cable and I switch to 31khz I get an oversized - doubled...

this is a jamma game that uses a mb3731 amp just like rastan, at the bench the audio is very low. touching the amp contacts will make some noise but not always. the pot is working. -5 is there. should I try replace the amp? what else should I inspect? here is a pic of the audio circuit...

A friend called me to go check his mario which after a moving has a problem with the display, it completely black, no signs of life. I am going to check the following -fuses -continuity for all cables connectors -voltages -gal @ U8 -transistors 2n5551 what else should I check? I have no...

sometimes I switch the game on and find all the displays are off, the ball in play display has some light in the lower part of the digits the other four are completely dark. I tested the voltages as described in pinrepair and all is good, adjusted all the connectors and nothing happens. removed...

ok when I start a game or enter test mode the top bumper (special solenoid) will be energized and stays on. so I replaced tip122, 2n4401 and 7407. nothing changes. before replacing the PIA I thought to post here for some suggestion. oh yes if I remove the connector with the blue wires the...

I had this board perfect and working but a quartz came off and I can't identify it...any clue? http://img718.imageshack.us/img718/4640/p1160617.jpg