HI,
I have a HP Pavilion zd7198cl. We were having power problems and I tipped the computer back and the power turned off. When restarting the PC (before soldering) there was the faint image that was better when I shined a flashlight right up to it. Not sure if the screen tapped the table or not. The jack has since been fixed with a bit of solder. While taking the laptop apart to solder the power jack I tested the connections to the inverter. They seem great going into the inverter, but on the other end of the inverter, where the connector attatched to the pink and white cables goes in, I don't seem to read anything... Pretty sure the pink and white go to the backlight. So my question is... should I be reading any thing at that connection? What would your opinion be?
Ready to provide more info if you need it. Thanks so much, Cheryl
I have a HP Pavilion zd7198cl. We were having power problems and I tipped the computer back and the power turned off. When restarting the PC (before soldering) there was the faint image that was better when I shined a flashlight right up to it. Not sure if the screen tapped the table or not. The jack has since been fixed with a bit of solder. While taking the laptop apart to solder the power jack I tested the connections to the inverter. They seem great going into the inverter, but on the other end of the inverter, where the connector attatched to the pink and white cables goes in, I don't seem to read anything... Pretty sure the pink and white go to the backlight. So my question is... should I be reading any thing at that connection? What would your opinion be?
Ready to provide more info if you need it. Thanks so much, Cheryl
never mind
Hi all thanks for looking, but I did find the info I needed at lcdrepair.net
just incase it isn't on here already ... this is the test I found for the inverter
"With a ac voltmeter that can safely accept above 3K volts.
or take a small screwdriver (1 mm shank) with insulated plastic handle and hold the steel tip of the screwdriver .3mm away from the + pin <-pink side pin) on the inverter output doing this while powering on, with obviously no LCD plugged into the inverter output plug, when powering up the inverter PCB will attempt to send about 1500volts ac high frequency into the 2 prong output socket, at that moment you should see a small arcing of electricity jumping the air into the screwdriver. If you cannot detect this effect the inverter is bad, (but be aware the inverter will only send 3 bursts of power out and expect a feedback signal. If none is present, it will go into self protect mode and turn itself off, just like your TV set does if it senses anything is wrong and you hear the ticking sound inside the set." lcdrepair.net
Hi all thanks for looking, but I did find the info I needed at lcdrepair.net
just incase it isn't on here already ... this is the test I found for the inverter
"With a ac voltmeter that can safely accept above 3K volts.
or take a small screwdriver (1 mm shank) with insulated plastic handle and hold the steel tip of the screwdriver .3mm away from the + pin <-pink side pin) on the inverter output doing this while powering on, with obviously no LCD plugged into the inverter output plug, when powering up the inverter PCB will attempt to send about 1500volts ac high frequency into the 2 prong output socket, at that moment you should see a small arcing of electricity jumping the air into the screwdriver. If you cannot detect this effect the inverter is bad, (but be aware the inverter will only send 3 bursts of power out and expect a feedback signal. If none is present, it will go into self protect mode and turn itself off, just like your TV set does if it senses anything is wrong and you hear the ticking sound inside the set." lcdrepair.net
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