Recent content by samwigman

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    Screen and Screen Cable Testing Tools

    I'd like to have something to test laptop displays and perhaps cables as well for determining which I have to order, if either, in case of a no display job. http://www.ebay.com/itm/Universal-LVDS-LCD-Monitor-Driver-Controller-Board-W-6-Key-Keypad-MT6820-MD-USA-/182086045249...
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    Lenovo Z50-70 (NM-A272)

    It turned out to be the eDP cable. Thanks again for the helpful troubleshooting procedure. In the future, I'd like to know how to determine whether it's the screen or the cable ideally without buying either. Inquiring in the Tools board.
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    Lenovo Z50-70 (NM-A272)

    To make a correction, I now tried VGA instead of HDMI, and I do get video.
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    Lenovo Z50-70 (NM-A272)

    I'm not sure if Windows 8 has a startup sound. I never used it. I know 10 does not. I figure if I'm booting up and sitting on the password screen, mashing keys and hitting enter should eventually play the "idiot sound" *thunk* thing. I don't get any of that, though it does read any drive you...
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    Lenovo Z50-70 (NM-A272)

    There's no image. Do you advise to go ahead and order a screen and cable? I was expecting to see something via HDMI at least with the laptop screen unplugged.
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    Lenovo Z50-70 (NM-A272)

    I do get the Caps light and a light on a USB drive. Are you saying that precludes the BIOS or that would indicate the BIOS?
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    Lenovo Z50-70 (NM-A272)

    I got in a Lenovo Z50-70. It has no video either via HDMI or the laptop display. It comes on with a power light and keyboard backlight. The fan spins only a second at power on and then runs continuously later. I'm not seeing any evidence of liquid damage on the board. I've found a schematic for...
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    [SOLVED]A1278 2009 (820-2530-A) No Video Via LVDS

    I'm updating to say that cleaning alone solved this, although I do not have an ultrasonic cleaner. Alcohol and a toothbrush cleared it up sufficiently I guess. There's still some somewhat concerning green stuff around U4900, U7750, and Q7620. I suppose I need to tool up better for the next job.
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    [SOLVED]A1278 2009 (820-2530-A) No Video Via LVDS

    I get 0V across each resistor. But I'm not confident that's what you asked for. I don't know if you mean voltage across each of these two resistors or voltage between one side of each and ground on a screw hole or what have you. I'm also not confident I'm turning the board on correctly. I...
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    [SOLVED]A1278 2009 (820-2530-A) No Video Via LVDS

    Hello Board Repair People I've got a customer A1278 2009 with neither video nor backlight response on the built in display. After reading various things that apparently weren't credible I decided to order a new display on the basis that the board was fine if I could get video via thunderbolt...
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