Re: Princeton VL1919

I think we are getting somewhere. I just realized that the screen (face down so I couldn't see it) had been going black after 30 seconds or so. When this is the case I get zero voltage. If I test the voltage point when screen is still lighted, it shows 5 volts and the south side of the fuse shows the same but the north side shows zero so it looks like a fuse issue. The regulator still shows zero voltage on all tabs but that is presumably because of the blown fuse? I pulled the power and tested continuity between the voltage point and the south end of the fuse...

Re: Princeton VL1919

Hi,
I have attached a photo of my boards annotated with text boxes to show where the voltage was measured. I used a digital meter this time to get more accurate readings. Hope this helps you help me!

Thanks...

Re: Princeton VL1919

Per your request:

U3 is marked 6F8L 1117L
1 = 2.5
2 = 4.5
3 = 5.0

U1 is marked MM1117 A B632
1 = 0.0
2 = 0.0
3 = 0.0

Thanks for the help.

Re: Princeton VL1919

Hi,

I have attached photos of the panel board. I am new to the forum and the pictures are the best that my camera can do. I noticed an F5 near the connector but it tested good. Hate to take a basically brand new monitor to the recycle drop off but it is not looking good. Is it possible that bad capacitors could give the same white screen issue? As mentioned the monitor has been in a box for 6 years unused so not much else could "wear out" except from age.

Thanks for the help....

A friend gave me a brand new monitor (5 years old but never removed from the original box). It worked fine for 1 day and then the next day the blue power light comes on briefly then a white screen. I have repaired the same model recently that had bad capacitors and that went well. The capacitors appear to be OK on this one and I see posts suggesting that a fuse might be bad. I have checked the fuses I have been able to identify but they all show continuity. I have attached pictures of both boards involved to see if someone else can direct me to a component that I may have missed. Thanks....