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Author Topic: PCB Board repairs...any body out there ?  (Read 971 times)

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garnerb350

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PCB Board repairs...any body out there ?
« on: October 19, 2009, 11:30:28 pm »
Werid thing happened to me earlier tonight...I was wiring up a joystick on the Mr DO cab...and I went to plug the joker in so i could see if everything was correct...when i plugged it in...all I could hear was a dull ringing....and then on the screen popped up  "ROM 2C4"...

I am so ticked off because of this...because this is my actual first restoration project...and now this happens....

Is there anybody here who can do PCB repair? or is it even worth it... Right now i cant decide weither to save this cab, or strip everything and make a 2nd mame cab...
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Kevin Mullins

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Re: PCB Board repairs...any body out there ?
« Reply #1 on: October 20, 2009, 12:01:32 am »
If that ROM is in a socket you can try to gently pull it out and clean the legs and re-seat back into the socket and see if that helps. Just don't put it back in backwards, look for the notch and note which side it's on.
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Not a technician . . . . just a DIY'er.

garnerb350

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Re: PCB Board repairs...any body out there ?
« Reply #2 on: October 20, 2009, 12:12:02 am »
Thanks for the reply Kev....Now this is going to be a dumb question...I guess the roms are the black chips located through out the PCB correct?...I guess that i'll be checking tommorow...


If it doesnt help...then what should i do?

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BobA

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Re: PCB Board repairs...any body out there ?
« Reply #3 on: October 20, 2009, 09:00:49 am »
ROMs are usually the ones with stickers on them.
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garnerb350

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Re: PCB Board repairs...any body out there ?
« Reply #4 on: October 20, 2009, 01:37:07 pm »
Well I popped the rom out and cleaned it...popped it back in...making sure no prongs were bent and then I get another rom error...I went to that rom and checked it...then i checked and I get a crazy looking screen...I then popped the rom out...placed it backwards and still nothing...I switched it again and still getting rom error...what next? arrrrrgh     :banghead:
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RayB

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Re: PCB Board repairs...any body out there ?
« Reply #5 on: October 20, 2009, 03:03:55 pm »
First and foremost you have to be sure your power supply is in good working order. Otherwise power spikes, too high voltage, etc could be damaging your board. A repair will only mean you pop it in and get it damaged again.

Do that first. Measure voltages. Do a power supply tune-up if possible.

Next, is cleaning all contacts, securing all cables and pushing in all socketed roms properly.
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SirPeale

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Re: PCB Board repairs...any body out there ?
« Reply #6 on: October 20, 2009, 04:38:24 pm »
Quote from: garnerb350 on October 20, 2009, 01:37:07 pm
...I then popped the rom out...placed it backwards and still nothing...

And now that ROM is likely toast.  Don't ever pop them in backward.
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