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Title: WMS 550 board 1.5 doesnt start up Post by: ggutierrez020 on September 03, 2009, 02:14:32 PM hi i have several boards wms 550 v1.5 that desnt start up and i have notice that the led array that form the number 8 doesnt turn off it is on all the time, the eproms game are ok i have tested in another board working and in a good board the led array comes off when i turn on the machine and then hear the "bong"
thank you[/size] Title: Re: WMS 550 board 1.5 doesnt start up Post by: Slotmaster on September 03, 2009, 02:38:50 PM 75% of the time its socket expansion or smoke / dirt on the XU-12 CPU Chip
Just remove, use contact cleaner and reseat. Then try the board again Title: Re: WMS 550 board 1.5 doesnt start up Post by: Bettor Slots on September 03, 2009, 06:06:15 PM And the other 25% of the time you need a new battery or hitting the yellow reset button on the board will do the trick.
Title: Re: WMS 550 board 1.5 doesnt start up Post by: ggutierrez020 on September 05, 2009, 06:24:20 PM i did your suggestions but nothing.... i have another that the led array turn off and i hear the "bong" but nothing in the lcd monitor, the lcd is in good condition, i aplied ram clear chip and i hear the "bong" but the same i cant see anything in the lcd
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