ProView CY-765 Monitor takes many tries to turn on.

[thestigp11gt]

I have had this monitor since 2004, and never given me any bother until now.

(with PC running - and does it with other PC also).

When I press the power button, the orange light changes to green, you hear a short click, and then the light goes back to orange. (same light as stand by). I press the power button about 20-30 times before the screen finally comes on, and when it does it is perfectly fine (using it now)

Once it has been on for a while, I can turn off the monitor and put it on again with no problems,

I had the back off it already but did not see any bulging caps or anything, not to say they are not dodgy of course.

Once thing I have notices that all the components inside the monitor are made by Samsung, if that makes any difference.

[selldoor]

Re: ProView CY-765 Monitor takes many tries to turn on.

Hi still need pictures- even though caps may not look bulged or leakey
they do dry out with time and Heat.
This has all the look of bad caps - As a first step when the set is cold
try and switch it on. - nothing?
Get a hair drier and warm ( Not too hot) the caps on the power supply board.
Try and switch on again?

If you look at the beginning of this forum - just click on "troubleshooting
computer displays" (above middle) there is an excellent guide to troubleshooting 2 secs to black by retired caps - start at post19.
Then you will be set to go when you get a new meter.

[thestigp11gt]

Re: ProView CY-765 Monitor takes many tries to turn on.

I will give this a try, The monitor is intact at the moment so will try and get the other one working first before I get wired into this.

[thestigp11gt]

Re: ProView CY-765 Monitor takes many tries to turn on.

Just another little update this morning, Monitor came on okay, however what I have noticed is until it warmed up, there was some faint strange diagonal lines which were moving about the screen,

[kc8adu]

Re: ProView CY-765 Monitor takes many tries to turn on.

open up the power brick and replace the caps inside.

[selldoor]

Re: ProView CY-765 Monitor takes many tries to turn on.

^^^Yes, ^^^hadnt realised it was an external power supply.

[thestigp11gt]

Re: ProView CY-765 Monitor takes many tries to turn on.

Had a look in the adapter, caps all look perfectly fine, got some weird copper paper shield around everything.

I think I have a power supply with the same rating, I might try that and see how it goes with the monitor.

[selldoor]

Re: ProView CY-765 Monitor takes many tries to turn on.

Good plan here is the schematic


the link is almost as long as the schematic!!! There are also a few threads on badcaps refer to this set.

[thestigp11gt]

Re: ProView CY-765 Monitor takes many tries to turn on.

Had the same issue with the other power supply, Monitor would not switch on,

I then looked to take out the hair drying, a 10 second burst inside the monitor, made it all warm, and then switched on with no problems. Not even interference through the screen.

[budm]

Re: ProView CY-765 Monitor takes many tries to turn on.

The ESR of the cap goes down when heated up, so you do have bad caps.

[thestigp11gt]

Re: ProView CY-765 Monitor takes many tries to turn on.

I will look to have them replaced then and see how she goes,

I am waiting on my LCD screen coming for my Arduino, I plan on making a little test matrix for caps.