A retired mechanic has a Concord PAL lift , and the RDC relay , nor led are activating , I feel it may be the power supply portion of the board , but are unfamiliar with this unit , the ribbon cable at the bottom of the board has the correct voltage entering from the mother board , so I believe it is probably a component issue , any help would be appreciated , as he really needs the use of this lift . I am a seasoned mechanic with 36 years in the biz . I do have the schematics , as that’s how I came to this conclusion , but was looking for some input hopefully
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