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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Need help checking an inverter on Gataway Solo 1400 LCD
Hello,
I've got a Gateway Solo 1400 with an intermittent backlight failure. I use to could press around the base of the LCD and upon re-start would come back. But now it won't at all. I can still see the desktop if I shine a bright light on it at an angle. I've removed the button panel and the bezel of the LCD, which reveals the inverter with easy access. I've measured the 4 input connector as follows: Pin 1 (Black): 0 Volts Pin 2 (Brown): 3.2 Volts Pin 3 (Red): 0 Volts Pin 4 (Orange): 18.7 Volts I've also held my scope probe close to the inverter transformer with no signal pickup. (I've tried this on other LCD's and can get about .5 Volt p-p at about 10KHz, as the laptop boots, this signal disappears for a second, I'm assuming it shuts off the backlight if no video signal is present to the LCD.) I just need to know if I'm getting the right inputs. pin 3 is suspect at 0Volts and no signal. Any schematics for these things available online? Thanks Kendall |
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