Megatech voltage

[Adamski]

Hi All
Just wondering what voltage your 12v is set to on your megatech?Mine is running 12.10.
Does it prefer a little more juice or not?
Also for some reason the border on the top menu screen turns from grey to yellow after a few minutes play.Any ideas?

 

[Ace`]

12v isn't critical like 5v, 12.10 is fine. A little less or more isn't going to cause any issues.

The colour issue sounds like either a monitor fault (a colour failing?) or a motherboard fault. I'd start with checking / changing the transistors on the motherboard video output, they're a common failure. I usually replace all three (or 6 if you do both video outputs) and the colour is a lot more balanced after.

 

[Adamski]

Are they easy to do?I have no experience of these things.Wouldnt know which ones they were or what to replace with.
These cabs are pretty flaky aren't they?
Mine doesn't like certain carts in certain orders and while changing carts today it has totally stopped displaying slots 7 and 8 and if I put a cart in slot 6 I only get a blank screen until it's removed

12v isn't critical like 5v, 12.10 is fine. A little less or more isn't going to cause any issues.

The colour issue sounds like either a monitor fault (a colour failing?) or a motherboard fault. I'd start with checking / changing the transistors on the motherboard video output, they're a common failure. I usually replace all three (or 6 if you do both video outputs) and the colour is a lot more balanced after.

 

[Bods]

what is the 12v powering anyway, Audio Amp obviously if built in, anything else?

 

[Adamski]

Marquee lights?

 

[itruk]

12v would be for the coin door bulbs, or any other small bulbs.
The marquee would be on a mains feed.

 

[Ace`]

yes and the amp / audio section of the board.

 

[Adamski]

Anyone got an idea of why slot 7 and 8 have stopped displaying and also what transistors I need to replace for video output and what I need to buy?