Polo 28" hot resistor?

[bertthedefender]

Hello everyone,

I've got a 28" Polo in my *very* unfinished Mame cabinet - it's not had much use of the last few years but I fire it up every now and then and it works great.  However, I was scanning the chassis recently and noticed how the PCB under one of those white square resistors looks discoloured due to heat (see attachment)

So my noob question is - is that normal, or indicative of some impending issue?

Also, I've noticed it has the original flyback with the light grey front - I think I've read somewhere that these were prone to early failure?  Anyone know where I could get a spare for the cupboard, either in the UK or with international shipping?

Cheers!

Simon.

[lilshawn]

it's fairly typical of these old phenolic boards. it's less noticeable in newer fiberglass boards. they get pretty dark when they get heated. that resistor is dissipating probably 8 to 10 watts of power while it's running.

[princess prin prin]

It's normal on Polos that the high wattage resistors (including the PTC) blacken the board underneath due to heat:

[bertthedefender]

Brilliant - thanks very much for the quick replies!   The monitor is my favourite part of the machine - I know they can do all sorts of things with shaders and filters these days, but there's something about that convex glass blob that has a special place in my heart!

Thanks again!