Re: Hyundai L90D+ inverter mosfet problem

Finally got to sit down with the monitor. Here is what i found:
S1 - D1 > 100k
G1 - D1 > 200k
S1 - G1 > 200k

S2 - D2 = 101k
G2 - D2 = 122k
S2 - G2 = 19k

These are in-circuit results. I can pull the chip and retest it you think that would give more valid results.

This is based on the pinout for the 9932 as shown in the datasheet. As mentioned, i have 5 of these I'd really like to get going, so any good ideas will be greatly appreciated. My local electronics...

Re: Hyundai L90D+ inverter mosfet problem

Finally got around to testing. Resistance isn't particularly low. Cut to the chase, what are the odds of the 9932 MOSFET solving the problem? Do i just go for it based on the experience of others? Or is there a possibility that C23 is bad? I've worked on laptops for years, and now trying to expand to LCDs. So far had great luck, but i don't hesitate to ask the experts, either! I have 5 of these, and would like to get them going again. Thanks to all.

Re: Hyundai L90D+ inverter mosfet problem

No, really haven't done any component testing. Just got these in, and got one opened up to look for the obvious cap problem. I've read this site enough to know to come here first! Not familiar with MOSFET testing, haven't done much. A little direction would be great, and an idea as to what else i might expect to see. I can do board work, including SMD (to a point). Just need guidance. Thanks again

Re: Hyundai L90D+ inverter mosfet problem

I have just gotten in 5 L91Ds with the typical flashing power LED symptom. Either flashes yellow then off or yellow, blue, then off. Anyway, i wanted to try the MOSFET fix, and have found some on ebay. Can someone point me to the component and save my eyesight! I have the monitor cracked open. A pain, but easy enough i guess. Thanks in advance.