Re: Sharp LC-32D62U horizontal lines



No, i did not solve the problem. I knew mine was a main board problem because I could put some pressure using my finger on one of the ram chips and get a clear picture. It would work for a while, but then revert back to distorted picture. Eventually the distortion got worse, and eventually I could see just solid vertical lines and no picture (only sound) .

I replaced the main board with another one that was supposed to be pulled off a working TV (I think the 37" model) but that didn't work . The replacement...

Re: Sharp LC-46D62U Static Dots and Lines on Screen

I have LC-32D62U model and same issues. IC3502 seems to be the problem on my set. Here is info on these chips from Service Manual

IC3501/3502 (RH-iXB822WJQZQ)
These ICs are 128-Mbit GDDR SDRAM (Graphic Double Data Rate Synchronous DRAM), providing a memory for image processing and buffering
OSD data.

On my TV the dots are not static. They are moving as displaying as white horizontal lines. Applying some pressure to one of the SDRAM chips at a specific point can cause the lines to stop moving...

Re: Sharp LC-32D62U horizontal lines

Thanks for the info. I think the problem is one or both of these chips.

IC3501/3502 (RH-iXB822WJQZQ)

These ICs are 128-Mbit GDDR SDRAM (Graphic Double Data Rate Synchronous DRAM), providing a memory for image processing and buffering
OSD data.

Re: Sharp LC-32D62U horizontal lines

I have attached images of the screen and the main board with heatsink / thermal pads removed from 2 main chips

Screen shows white horizontal lines. Is this a over heating problem on the main board?...

I have an older model year (2007) 1080p Sharp LC-32D62U. Great unit but it does get hot, which is probably a problem for the components inside.

I had fine white horizontal static and moving lines appear one day on all inputs and on the OTA antenna. Also, the on screen display area (volume control, channel number / input display, setup menu etc.) were not solid and all displayed prominent vertical lines.

When I opened the TV i noticed the thermal pads fell off of the 2 large chips on the main board. The adhesive glue that held them on top of the chip had dried out....

Re: New Members - please post your introductions here

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