Fuzzy screen - Bang side of machine ---- Fixed. What could be the cause of this?

[kingoddball]

Hello all,

How is everyone

My arcade machine is running well (MK1), it has a new screen in it (LG TV put in here).

Works and looks great, but I turned it on (must have bang it or something) and the screen was fuzzy and funk'o.

Like the H-Sync was out (pic attached).

A few power cycles later, no fix... Decided to try the fonz move and bang the side of the arcade.

This fixed the screen.

Bad part - bang again and its out!

What could be causing this?
I'd like to try and fix this up permanently.

I'm installing a PC with (mame) MALA FE.

hmmm.. cant upload an image...

I'll be back! 

Picture!

https://www.dropbox.com/s/9m0fkufiodc1szx/file%205-05-2015%2014%2028%2028.jpeg?dl=0

[mgb]

Usually it's due to something loose like a cold solder joint on the chassis board.

[Malenko]

Usually it's due to something loose like a cold solder joint on the chassis board.

that or just check the video wire to the monitor, make sure the wire for sync is firmly inside the connector

[harveybirdman]

2nd this..  Make sure the neck board connections from chassis are all secure.

[pbj]

cap kit

[kingoddball]

Thank you all!
I'll roll it out tonight and check wires and joins.

This Cap kit... Could someone explain this?

I have done many cap kits on old Sega Gamegear handheld consoles, and always worked great - They usually have dull/close to dead screens or no sound.

On the arcade, my screen is perfect - this is the first issue I saw, so if anyone can supply some info on  this cap kit, I think it may be beneficial to replace them anyhow.
It's a new screen, but all components are original 1992 - So I'm assuming all caps are leaky old electrolytics.


Thank you all again. Good advice.

[mgb]

I think pbj may have been trying to make a funny by saying cap kit
There was a period where many people seemed to be on a cap kit frenzy.
So every problem that someone had with a monitor, there would be a lot of guys saying to do a cap kit. It didn't much matter if the monitor problem was no power or screenburn. They'd say " time for a cap kit"

Not sure if I missed it, is this a regular arcade crt monitor or an lcd.
On a standard crt going blurry, I'd possibly be looking at either a flyback issue or in the case of it clearing up with a slap, maybe the focus wire is a bit loose. The focus wire goes from the flyback to the neck board along side the tube socket.
  But of course, it very well could be something as simple as a loose video cable although many times that would get worse with a slap because it would tend to come out further.

[jdbailey1206]

... Decided to try the fonz move and bang the side of the arcade.

Did you try jumping over it like a shark?

[yotsuya]

... Decided to try the fonz move and bang the side of the arcade.

Did you try jumping over it like a shark?

If I had moves like the Fonz, I'd be snapping my fingers to get the bitches out of the woodwork myself.