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Author Topic: Roms Wrong  (Read 4218 times)
chipw
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« on: June 01, 2012, 01:53:57 PM »
Hi, I have a sigma sg50 that is giving me a roms wrong on the display. any ideas on a fix for this. Thanks
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riverratmike
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« Reply #1 on: June 05, 2012, 11:11:23 PM »
I had this happen to my SG50 when I removed the battery on the PCB board and then re-installed it. I had to reset the machine and that fixed it. Any photos of your machine you could post?
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Mr. Dinoman
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« Reply #2 on: June 06, 2012, 02:50:08 PM »
If using the re-set key does not clear the problem, then you have to replace the battery...Check battery voltage first...
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chipw
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« Reply #3 on: June 07, 2012, 01:55:36 AM »
thanks for the responses i tried the reset and tested the battery. i think it said 3.4 volts. took chips out and reseated them and now i get no display at all. machine lights come on but no display. could it still possibly be the battery?
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riverratmike
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« Reply #4 on: June 07, 2012, 03:13:10 AM »
sounds like you have a loose connection in there somewhere. My SG50 was also malfunctioning when I got it. I just unplugged all the connectors I could find and re-connected them and poof.... it started working normally. If you have 3.4 volts doesn't sound like the battery to me is the problem.
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Mr. Dinoman
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« Reply #5 on: June 07, 2012, 01:31:36 PM »
Verify that all chips are installed the right direction...Battery sound like it is good...Make sure it is soldered on good...
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chipw
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« Reply #6 on: June 09, 2012, 01:48:27 PM »
Thanks Again. A little background this mach would almost always say roms wrong when turned on after being off for an extended period of time. i would just to keep switching off and on and it would eventually start to work. after this last time of being off for at least six months i got the roms wrong and will not reset and now as stated previously the display is just blank after me messing with the board and chips. i have thought i have checked all connections a few times can you suggest anything else i should check. Thanks
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gminellono
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« Reply #7 on: July 02, 2012, 05:47:30 PM »
SG50B machine reads RAMS WRONG.  Machine has been unplugged for years.  Is the battery a clip on type or one soldered to the board?  I'm uneasy about how to replace.
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riverratmike
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« Reply #8 on: July 02, 2012, 11:00:32 PM »
the battery is spot welded to a metal housing which is soldered to the MPU board. I found out the hard way and broke mine and tried to solder it back together but the solder wouldn't stick to the battery and I couldn't make a connection. So right now my battery is barely making contact to the plus and minus.
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