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Space Invaders Power board issue


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Hi Guys

Im onto getting my SI upright going knowing it had power issues when I got it

The previous owner had issues with one of the fuses going on the power supply which seems to be Ok now for some reason but I did pick up that on the power board the 2 white rectangle block things (excuse my ignorance) were red hot when I pulled the board out and accidentally touched them

Obviously there is a problem somewhere which leads me to thinking should I ditch the whole board and just go with a switching power supply 

As much as I like to keep things original what are your thoughts - repair if possible or replace for reliability etc 

Cheers

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Try measuring across all of the little tantalum capacitors in case any have gone short circuit,  a common problem.

Too valuable in original condition to modify imo regards John

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4 hours ago, jbtech said:

Try measuring across all of the little tantalum capacitors in case any have gone short circuit,  a common problem.

Too valuable in original condition to modify imo regards John

Thanks but knowledge is limited so will probably get someone to check it

What I did do is measure the voltage out from the board harness and 5v is good but 12v was 18-20v 

I also noticed when I was measuring the voltages at the harness (not plugged into the board) that the 2 resistors (thanks gemini2544) were cold so Im assuming when its plugged into the board the high 12v reading is causing this ????

Remember my knowledge is limited  LOL

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Personally If you knowledge is limited I'd leave it for someone who is  more in the know. One slip and you've done more damage. I've seen boards that just had a bad diode pretty much destroyed by inexperienced owners. Not a dig at you, just some free advice.

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25 minutes ago, Gemini2544 said:

Personally If you knowledge is limited I'd leave it for someone who is  more in the know. One slip and you've done more damage. I've seen boards that just had a bad diode pretty much destroyed by inexperienced owners. Not a dig at you, just some free advice.

 I usually do leave it to the experts but also trying to learn on the way for future reference

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So can anyone recommend someone to get the power board and probably PCB checked and or repaired?

(Not Jomac as I have already asked and cant do it) 

Cheers

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