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I don’t have access to schematic for HTR550 but I do for HTR500 and it will be very similar. The components of interest are in the display board, primarily the electrolytic capacitors, it has likely failed. The screen brightness voltage comes in as ac to the screen board then goes through the circled area in the picture below, the likely failure is as said the electrolytic capacitor or could be dry solder joints. Burnt resistor will always be permanent and not intermittent. It could also be the -VP line causing the fault but this is less likely.
The video card to your Onkyo is OK, as it displays the Onkyo Logo. Contact the authorized service center for Onkyo. A firmware update is necessary. With a Corrupted firmware, this kind of display effects can occur. Gopakumar Gopalan Google
Try factory reset: while holding the(CD) button on front panel,press (POWER) button.
After "Clear" is displayed the unit should be back to its factory default. :) If this dont work for you take the unit to be checked by service . :)
After turning on unit and before the windows logo appears, press F8 repeatedly until a new display appears. Use the arrow key up or down and choose "Last configuration that worked".
Hello, I am sorry about you issue. It sounds like your player needs to be serviced. I have included a link to search for an authorized service center. Thank you, Onkyo USA
https://www.onkyousa.com/Support/servicecenterlocator.php
that would be you display processor ,the display panel or chip would have to be replaced ,not worth it i had kenwood that did cost more than it is worth
Hi.
I've worked on several of these thinkpads which had this problem. There are a couple of things it could be depending on what the display actually looks like. If it "whites out" , or has lines.
First, make sure the ribbon cable is connected properly. If the lcd lights up at all, the inverter is fine.
Next, while booting the machine, press in on the memory; this might work better if you only have one memory stick in the machine. Just putr pressure on the memory towards the motherboard. I know it sounds weird, but it's a possible problem.
If that doesn't do it, the lcd may be shot.
Good luck
The unit has a built in display dimmer, with a button to control the level of brightness from the display both on the remote, and the front panel.Try this
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