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- HP Pavillion dv7-6187cl Win7-64bit
November 11, 2012, 5:44 pm
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My laptop displays large thick horizontal lines and flickering screen . Of=
ten the entire screen goes black and displays a gray screen saver . Someti=
mes I see short dark blue lines among the black lines. My mouse and key bo=
ard are unresponsive. If I change the tilt angle of the screen, it sees to=
fix it for a short while.
Is this a hardware interconnection problem? Is my graphics card going?
Let me know of your suggestions and diagnostics.
Re: HP Pavillion dv7-6187cl Win7-64bit
the entire screen goes black and displays a gray screen saver . Sometimes I see
short dark blue lines among the black lines. My mouse and key board are
unresponsive. If I change the tilt angle of the screen, it sees to fix it for a
In the picture here, of the LCD panel, there appear to be two connectors.
(Amazon.com product link shortened)
The lower left corner, has what looks like a Kapton film (flex) connector
with high speed signals on it. A second connector labeled "40 pin" and
CN1 (stands for Connector 1) could be related to power, but it's hard
to tell. The panel is supposed to be LED illuminated, so we can't blame
a backlight/inverter problem here.
I'm guessing the high speed connector is a little loose, the one in the
lower left corner. It is hard to tell in that phone, whether there is
a lock latch or anything to secure the connector from falling out.
Take it apart and do a visual inspection. You might get lucky.
In terms of determining "whether the computer is responsive",
one test you can do is "ping" the computer using a second
computer. Say you know the DHCP address range of your
router, say 192.168.1.3 and your test computer is 192.168.1.2.
You can try "ping 192.168.1.3" from the test computer and
check for a packet response. If a packet comes back,
the computer is responsive.
Another test of responsive, is to press the shift lock key
over and over again, and check for an indicator LED on the
laptop to change states. If the keyboard uses LEDs for
feedback, the shift lock provides proof of "responsive".
When the input subsystem goes down, and is no longer
checking the keyboard, the shift lock test will fail.
But if the "ping 192.168.1.3" test works, then you know
the network and processor portion of the laptop are still
alive. So it's not a "processor crash".