I lost my LC45GX6U to the WSOD on 2/1/11. After finding this thread, I pulled my DC/DC board and found the tell-tale discoloration.
After checking all the third-party suppliers in this thread and coming up empty, I chanced upon Andrews Electronics, who said they had an RDENCA089WJZZ board on backorder and could ship it on 2/7. I promptly placed an order.
2/7 changed to 2/14. Then 2/14 changed to 2/28. And so on.
Around 3/1, inspired by Quintard's and GreatDane's posts, I decided to try Plan B: repair. I was able to identify IC952 as a SHINDENGEN MD1222N (datecode 00+). I found this part at:
Cost was $3.00 + $19.00 S/H. Great response, prompt service, UPS delivered it in 5 days from order.
Unfortunately, I have never desoldered anything that small before. I was able to get the chip off, but I somehow pulled a couple of the pads off the PCB as well. I put it aside before I could do any more damage.
Back to Plan A. On Sunday 5/1, I emailed Andrews Electronics again for a status update. Yesterday (5/2), I received the following:
Sharp requires the model and serial number on the TV to authorize the order. I'm sorry, the status must have changed on the part since you ordered it originally.
A credit was issued back to your credit card on 4-25
So this afternoon I called Sharp. After breaking out of 'IVR hell', I got hold of someone who seemed sympathetic. They got me on the line with someone from Dispatch who seemed to know what she was talking about - not only was she able to pull up a timeline of the 'estimated delivery dates', she was able to pull up the list of pending orders, including mine from Andrews Electronics.
She told me:
a) Sharp does not sell parts direct to consumers. I would need to contact a Sharp Authorized Servicer and have them order the part using my make/model/serial.
b) SharpUSA did not have any RDENCA089WJZZ in stock, and it is still on back-order. They have an order in for it, but the dates have been pushed a number of times. She guessed that it would probably be several months before they ever get delivery of that part.
I asked if she was just trying to find a nice way to say 'discontinued', and she said: no, we have the order in and we have pending orders waiting for this part. If it was discontinued, it wouldn't be in the system. She asked me a little bit more about the DC/DC board issue and I told her about this thread.
So I went down to my local Sharp Servicer and explained the situation. He put in an order for the part, and now I will just have to wait. In the meantime, I am going to try and find someone who might have the tools and expertise to maybe recover my original board and replace the MD1222N.
I will post again if I get any new information.