Proview Pro576 (Model 568) delays to start when cold.
I have a Proview LCD 568 that has no bad caps on a visual inspection, but it delays to start on cold. Checking my notes, all the caps are su'scon (in the bad list), so maybe your problem is similar to mine. I had this since the beggining of the last year, and I had forgotten about it when I was cleaning this morning and found it. I didn't open it again, but went straight to my notes. On them, I saw that (as mentioned) all the caps are su'scon. It has:
07 - 220uf 16v
03 - 22uf 16v
07 - 100uf 16v
All are Su'Scon @ 105C (no series. I was not aware of such things back then).
The problem with the monitor is : When it is turned on after being off for a while, the power led starts blinking and if you press the On/Off button, it won't respond. After a while, the screen starts up and you can turn it on/off and it works perfectly, until you let it off for a while (an hour and a half is enough). If I disconnect the ribbon from the VBoard to the LCD Panel, the power led goes to solid green as soon as you press the ON button, even if cold. The behavior is present only with the LCD panel actually connected to the VBoard (according to my notes). The PSU is an external 12v 3.5a brick, and besides the VBoard, there is only a standalone inverter (not same board). I have tested the inverter using a 12v PSU (a cable adapter from an unused ribbon and an extension for a molex cable of a n ATX PSU) and it starts OK everytime. Any suggestion?
Will dissasembly the LCD tomorrow and will take pictures to post if necessary.
Eduardo
07 - 220uf 16v
03 - 22uf 16v
07 - 100uf 16v
All are Su'Scon @ 105C (no series. I was not aware of such things back then).
The problem with the monitor is : When it is turned on after being off for a while, the power led starts blinking and if you press the On/Off button, it won't respond. After a while, the screen starts up and you can turn it on/off and it works perfectly, until you let it off for a while (an hour and a half is enough). If I disconnect the ribbon from the VBoard to the LCD Panel, the power led goes to solid green as soon as you press the ON button, even if cold. The behavior is present only with the LCD panel actually connected to the VBoard (according to my notes). The PSU is an external 12v 3.5a brick, and besides the VBoard, there is only a standalone inverter (not same board). I have tested the inverter using a 12v PSU (a cable adapter from an unused ribbon and an extension for a molex cable of a n ATX PSU) and it starts OK everytime. Any suggestion?
Will dissasembly the LCD tomorrow and will take pictures to post if necessary.
Eduardo
)
One of the first things I did. I took a good known, working brick from another Proview, and same result.
I'm learning new things in this forum. Honestly, I received basic electronics instruction as part of my Computer Maintenance & Repair course 15 years ago, and beyond what components are/do, and soldering skills I acquired when I made (a lot of) null modem cables. But apart from that, only reading and browsing on the forums gave me the "I can do it" idea, and thanks to people like you (PCBONEZ, Krankshaft, Wizard and all the other users/members who contribute here whose names escape my troubled mind right now... I might have cap problems myself 
) I am learning. I have saved so far like 15 LCDs from the landfill, and I'm proud of that. And I'll be prouder if I can find those 5mm caps.......
, but then again, all Su'scon would have to go anyway for the repair/recap to last, or am I wrong?
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