Hi guys,

Since I got my MET (not LED version) it has been having an issue which is driving me crazy:
Whenever a lamp on column 1 is lit, the lamp #57 is slightly flashing. It has a non-ghosting LED from comet
Same in column 2 with lamp #58.
I've tested the diods for all lamps on those rows (except snake and start which don't seem to have one) and they all test good.

Tried changing both sockets (along with their diods) and LEDs but of course, it did not change anything.

Any idea of what could cause this behaviour on those lamps?

(it's a pro met that I switched to LEDs but was originally with regular bulbs)

they already have diods
They all test good.

Oops you meant those
No idea, I can try

So, I tried to add a diod on the start button lamp.

On one way it did nothing, when reversed it did prevent the other led to light up, but it also completely stopped the start button light.

Anyone has any idea ?

Up

Up

And start + snake do have diods,; they located further away from the socket

Yep, with regular bulbs, no ghosting.
Hmm weird cause I have no ghosting on my Lotr.
Did not have any as well on Sopranos, family guy...

This is why I am really surprised with this issue and can't manage to pin point it.

Would anyone have the schematics of the board?

Thanks, no idea why I did not instantly think of it ^^'

So you're right, past lamp 57 it does not occur.
Should I change U13?

Will do, many thanks fot the insight!

Solved.
Was due to this mod, having no diods in the sockets:
https://pinside.com/pinball/market/classifieds/archive/44754