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LED 27" monitor PSU issue - np power to LED array

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    #21
    Re: LED 27" monitor PSU issue - np power to LED array

    Originally posted by lotas View Post
    Check the connector and the passage of 5v to 1117 and the capacitors in the power supply on the 5v bus.
    I've assembled it back in the casing, I'll leave it on for a while...

    So, it's now powering up and displaying.

    Dougie.
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      #22
      Re: LED 27" monitor PSU issue - np power to LED array

      Congratulations, the monitor is back in service.

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        #23
        Re: LED 27" monitor PSU issue - np power to LED array

        Originally posted by lotas View Post
        Congratulations, the monitor is back in service.
        And big thank you to you too

        The 5v-3.3v reg IC was definitely reading very low even though there was 5v getting to the motherboard from the PSU.

        Maybe supplying the external 5v 'reset' the regulator IC?

        Strange indeed.

        Dougie.

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          #24
          Re: LED 27" monitor PSU issue - np power to LED array

          If this problem repeats, it is better to replace it (1117 33), it happens that they do not work correctly when cold, but it is worth heating it with a hairdryer or a soldering iron and it starts working again (putting out the correct voltage.

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            #25
            Re: LED 27" monitor PSU issue - np power to LED array

            Originally posted by lotas View Post
            If this problem repeats, it is better to replace it (1117 33), it happens that they do not work correctly when cold, but it is worth heating it with a hairdryer or a soldering iron and it starts working again (putting out the correct voltage.
            Good idea, I'll order one, they don't cost much.

            They guy who gave it to me said it just went off one day and never came back on.

            Dougie.

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