Sharp LC-52LE830U Lightning Strike No Standby

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

My fault, if pin 5 is the lone pin on that side then I was mistaken on the pin labels on that side of the chip.

Pin 1 = 166V
Pin 5 = 0V
Pin 7 = 166V
Pin 8 = 166V

[tom66]

Re: Sharp LC-52LE830U Lightning Strike No Standby

It's still dead, Jim(John). Replace it and any resistor connected to pin 7/8 as it looks like they may have failed open too.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

will do

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

Found a PSU on eBay for $45. I figured it was worth it to not have to spend the time fixing the old one. Looks like I didn't need the main board after all.

[tom66]

Re: Sharp LC-52LE830U Lightning Strike No Standby

The IC was only a few bucks but it depends on how many other components were damaged, good job fixing it. How's the picture on this LED-LCD compare to a good plasma? Sharp LED-LCD are supposed to be the market leaders.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

it depends on how many other components were damaged

That was my concern. There's a chance that not many other comonents got zapped, but there's a chance that several other components, including those tiny little surface mount ones, got zapped. There's also a chance that something else would go out shortly after getting the old one working again. I figured for the money, it was worth it to not have to deal with it.

How's the picture on this LED-LCD compare to a good plasma? Sharp LED-LCD are supposed to be the market leaders.

I've only played one movie through it via the Netflix app but it seems to be pretty nice.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

Well, I held onto this one, not sure if I should keep it or sell it. I made the mistake of never checking the HDMI inputs. I had it in the basement and watched several movies via Netflix, A/V, and USB. I finally listed it for sale and sold it Sunday, just to have it come back yesterday because none of the four HDMI inputs worked. It looks like I need to replace the main board but I'm open to any other suggestions.

[tom66]

Re: Sharp LC-52LE830U Lightning Strike No Standby

That would seem likely to me. Surge damage is nasty. If you can source the HDMI multiplexer, you may be able to get away with replacing only that, though it is not an easy job.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

http://www.partsimple.com/vhisii9387-1q-004-n-4.html

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

Tom, I bought another main board and it didn't work. 1-1, lamp error code. The seller refunded my money and let me keep the board. Do you think it's possible to remove the HDMI chip(s) and swap them?

[tom66]

Re: Sharp LC-52LE830U Lightning Strike No Standby

Yes, but it will be a very difficult job. There -must- be a way to reset lamp error. Have you tried locating eeproms? Those are a lot easier to swap between boards, little 8 pin SMD things. 24Cxxx (xxx=16,256,etc...) marking typically. They probably hold the "there is a lamp error" fault.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

I'll have a look. Thanks.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

Here are the IC specs from the SM. Do I want the one that stores user settings or CPU settings?

[tom66]

Re: Sharp LC-52LE830U Lightning Strike No Standby

You may as well do both.
Just make SURE not to get them the wrong way around.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

IC8455 is an 8 pin EEPROM I swapped it and still have the 1-1 code.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

The other is a 48 pin. I'm not really sure I have the skill to do a 48 pin IC

[tom66]

Re: Sharp LC-52LE830U Lightning Strike No Standby

That's a flash memory, probably won't be storing the 1-1 code. No other 8 pin EEPROMs?

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

I found another. IC2005, I swapped it. It powered on! I've gotta connect something to it to verify that the HDMI is working. Fingers crossed.

[johnboy1313]

Re: Sharp LC-52LE830U Lightning Strike No Standby

IT WORKS! Tom you are amazing. Thank you!

[tom66]

Re: Sharp LC-52LE830U Lightning Strike No Standby

Fantastic, enjoy!
It may be a good idea to invest in an EEPROM programmer for other repairs. I built one myself using a PICKit2 from Microchip.