Proview 700P RPC-787KC/October 2006

[badrianiulian]

Hello
I have this monitor (with speakers) that once in a while does something like: half screen split weird lines flickering
I once had it sent to service in warranty and they exchanged D17 and D18 with 1N4148.
I keep changing the same diodes when it restarts the weird flickering thing.
For now i tried 1N4449 since I couldn't find 1N4149 to see if the thing comes back again.
Just wanted to give people a head's up before people would think throwing it away.
Will keep you posted if the image distortion comes back again.

[Th3_uN1Qu3]

Re: Proview 700P RPC-787KC/October 2006

That looks a lot like something i've had in for repairs, only it was called "Bestview". I don't recall if it had speakers tho, but anyway...

The real cause of that issue is likely to be the logic board, specifically, the 1.8v regulator or the capacitor on its output. You haven't told us where the two replaced diodes are located, a schematic would be helpful.

[badrianiulian]

Re: Proview 700P RPC-787KC/October 2006

Hello again
So the flickerin' is back and I took a picture of the main board
There is no 1.8v regulator though, only a 3.3v

[badrianiulian]

Re: Proview 700P RPC-787KC/October 2006

Even though the caps on the power board looked OK I replaced them. There were 2 caps of 680uF/25V on one voltage side and another 2 of 680uF/25V on the other and I replaced them with caps of 1000uF/25V + 470uF/25V on each side. Also there were another 2 caps of 470uF/25 witch I also replaced.
So far it's looking fine and no flickering has appeared in the last 12 hours (while it was working)