i have epson 7450 all-n-1 printer, when i turn power on printer it shuts my compute

Discussion in 'Hardware' started by rustnanc, Nov 17, 2009.

  1. rustnanc

    rustnanc Private E-2

    i have epson 7450 all-n-1 printer, when i turn power on printer it shuts my computer off. im running xp sp3. printer works on my other computer fine. all other usb devices work fine. not showing usb printer port that the printer software should set. like on my other computer does. please help, driving me crazy
     
  2. plodr

    plodr Major Geek Super Extraordinaire

    Re: i have epson 7450 all-n-1 printer, when i turn power on printer it shuts my compu

    Two things might cause this: a marginal power supply that does not have enough power to supply for the printer and too many items in all the USB ports which can't supply all the power requirements.
     
  3. rustnanc

    rustnanc Private E-2

    Re: i have epson 7450 all-n-1 printer, when i turn power on printer it shuts my compu

    disconnected all usbs still same thing. is there a way to check power thru usb?
     
  4. plodr

    plodr Major Geek Super Extraordinaire

    Re: i have epson 7450 all-n-1 printer, when i turn power on printer it shuts my compu

    Yes. If you open device manager and click on + in front of USB controllers then right click on USB Root hub and select properties, you will get a box with tabs. If you click the power tab, you are shown how many ports you have. The standard is 500mA for each port.
    I'm not sure how you can measure what the AIO is drawing but if it works okay on another computer, I think we can assume that it is not trying to draw more than the port can supply.

    I also am clueless as to how you can test a USB port to see if it is supplies the 500mA.

    Perhaps an electrical geek will look in and suggest how you can test this using a multimeter.
     

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