Hp W1907

[sprocket]

I have read all I can find already posted about this monitor and none fit my problem exactly

First of all the monitor was given to me like this, so I have never seen it operate correctly

When I hook it up using either VGA or DVI it will show all the post text and for a very short time flash the desktop then a small box appears showing the resolution and saying no signal and the picture leaves but the power button stays blue

If I push the Menu, that same box shows again but for a split second, the desktop shows and then goes black.

I used a MaxBlaster boot CD for a signal source to see if it would stay on but the same thing happens

One time, it came on and stayed. That time I pushed Menu and actually got it where I could +- all the options but as soon as I chose one it put it right back in the loop again and haven't been able to see the Menu since, it always shows the rez and no signal box.

I had new caps and did every one on both boards except a 22mf and the big one on the power board (I didn't have those 2) but no change at all

Whats happening and which board am I fighting

PS: I did a voltage check on the 2 red - 5v lines during boot up and they both stayed right on 5v from working to failure. The on and off reads abut 2 when on and 0 when off

[Toasty]

Re: Hp W1907

What brand/series caps did you use for replacements and where? Pics please. Where is 22uF one located?

[sprocket]

Re: Hp W1907

I used mixed Rubycon and Panasonic from Newark.com. I got these and some others while fixing my SyncMaster 226BW

The 22uf was on the small board where the internal speakers plug in

I have it all back together so I can't right now give you the location number

Without taking it back out right now the board looks like this one

https://www.badcaps.net/forum/attach...chmentid=10639

I didn't actually compare the board numbers though

After turning it off and on several times, that small screen is a status screen and flashes so fast it's hard to read but looks like the No Signal I was reading may have been the VGA when hooked to DVI and visa versa

I gives me the rez also and this is what comes up instead of the Menu

[Toasty]

Re: Hp W1907

What -series- Ruby & Pana? 105°C caps? It makes a difference in the SMPS.

The 22uF is not important in this situation.

You should find, I believe, both 5v & 12v on the power plug if all is correct. PlainBill should pop in here anytime and verify that.

[PlainBill]

Re: Hp W1907

What -series- Ruby & Pana? 105°C caps? It makes a difference in the SMPS.

The 22uF is not important in this situation.

You should find, I believe, both 5v & 12v on the power plug if all is correct. PlainBill should pop in here anytime and verify that.

I'm not familiar with the monitor. This sounds like a problem with one of the voltages on the logic card. This may be due to a noisy +5v or +12V (either one can be used), or a problem with one of the bucking regulators on the logic card.

PlainBill