Question about Compaq Presario 1510 (White) 15 in.CRT Conventional Monitor

1 Answer

Have lost ability to control brightness.

We have had this monitor for years but just last week the brightness has become all screwed up. Even when booting so it should supposedly be a black creen with some DOS text our's is displaying a bright grey. overall it is very difficult to use, but before I dump it I thought there might be a fix available. thanks in advance.

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  • Compaq Master
  • 2,480 Answers

Lost,
wow a CRT that even glows at all , and you wonder why its dem
the electron gun cathodes get weaker every day of its life.
all CRTs do that, not one or even TVs using CRT
the red gun always goes dim first so we crank it up in the OSD.

if it fails on all PCs, the monitor is bad, a 5 min test. and bingo
then if the monitor is known bad then what.
the OSD screen ever seen that, and the front panel key marked MENU/?
go there and play with brightness, and even the electron gun tuning, the page for that is RGB, Red Green blue.
adjust them so white looks OK.
but if all are dim, that is normal for old CRT,
we only get like 3 folks a year stuck in 1990s... or older.
the labor to fix it is 3 times a new LCD LED display.

land fill time. like the other billion made, and scrapped

Posted on Nov 20, 2017

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: Horizontal Bright White Line in Middle of Screen.... and thats it.

I am having a similar issue with my NEC multisync FP912SB monitor. In my case the problem is intermittent, the line remains at the same level of brightness, and the osd, when activated, is compressed in that horizontal line as well. The problem is occurring more and more frequently. Banging on the sides of the monitor sometimes brings the picture back temporarily. I came across this. http://en.allexperts.com/q/Monitor-Problems-2115/Thin-horizontal-line-monitor.htm

It states that the problem is called vertical collapse and is caused by the failure of a couple of I.C.s in the monitor.

Hope that helps.

Posted on Nov 13, 2007

Benimur
  • 6966 Answers

SOURCE: Brightness

Hi,

All CRT type monitors have an FBT that supplies the high voltage to the tube. Additionally, it also supplies the G2 voltage that is responsible for the screen voltage. Often the adjustment for the Screen/G2 requires a bit of tweaking after some time of usage. Incidentally, there is another adjustment in the same area for the Focus control. Of course, adjustment would have to be done on a "live set" and on the high voltage section, extreme caution must be exercised when performing this operation.

In some extreme cases, it could be a cold solder or loose connection in the squarish PCB at the very rear of the tube. Alternately, it is also possible for a capacitor that is nearing end of life (dried up).

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 21, 2008

chinna_1977
  • 65 Answers

SOURCE: COMPAQ 7500 monitor, MenuBar/Brightness Bar, Keys not working

replace Menu buttons (Microswitches) and check 5v path
check dry points.

Posted on Oct 15, 2008

pravinbhavsa
  • 348 Answers

SOURCE: monitor is control locked

you did not given details of model, company complet discreption of problem ok no problem you press the four keys on the monitor for five seconds simultaneusly or till it will show the massage "keys unlocked" then release

Posted on Nov 23, 2008

  • 77 Answers

SOURCE: The brightness adjustment bar appears on the screen all the time

Press the menu button on monitor select the brightness press the menuside button increases or decreases.after select exit oress the exit button on monitor.

Posted on Jul 13, 2009

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