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Thread: DeskPro 386: PSU assy. issues

  1. #11

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    I got two of these today; and one of them had a capacitor explode on me!!
    Iím glad I got my answer; recap both motherboards (if the one that exploded is ok)
    Took the HDD out of one; is it MFM or ESDI??
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  2. #12
    Join Date
    Oct 2016
    Location
    Illinois, USA
    Posts
    236

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    Quote Originally Posted by armankordi View Post
    I got two of these today; and one of them had a capacitor explode on me!!
    I’m glad I got my answer; recap both motherboards (if the one that exploded is ok)
    Took the HDD out of one; is it MFM or ESDI??
    Cap problems are apparently very common; the 15 10uF 15V caps were my suspects. If your case is anything like mine, those might be a good starting point for replacements. Mine's been running steady since I swapped 'em out for 10uF 25V caps.

    Seems like Dp386 systems only ever have ESDI or IDE, per Bear's statement.

    Quote Originally Posted by bear View Post
    IDE was standard from the start. You only got ESDI if you ordered the 130 MB configuration.

  3. #13

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    I recapped one of the motherboards; nothing. Still the same power on for half a second, then powers off and loops.
    Now, when I disconnected the PSU from the motherboard (before recapping) I turned it on to test voltages and the damn thing blew a tantalum.
    Could that be the reason? Could all the caps in the PSU need replacing? The PSU makes a small whining when it attempts to start so, i'd guess that's my problem.

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