Re: Hp lw1965

Hmm... and now the 2045 is working again, after I heated up the office. I guess I don't like working in the cold, so neither does the backlight ;-)

The LW1965-- I'm playing it safe and waiting for the fuses to come. I bet by next week it will be here.

Re: Hp lw1965

Well, the fix on the 2045 worked for a week. Now this morning after the outside temperature plunged to -7C and I hadn't been in my office a few days, so its cold too, its again doing the two seconds on, then off. I guess ambient temperature would affect marginal capacitors?
I ordered an ESR meter off eBay a week or two ago, so I guess I can go through those when it gets here.

Re: LED replacement for CCFL in PC monitors?

Thanks. I guess typical ambigous ebay offer from China. Seller didn't seem to know anything when I asked them about it either.

I've seen some kits on eBay from China that replace the CCFL tubes along the sides of the LCD with strips of white LEDs, and it comes with some controller and unclear directions about how its going to interface with the display.

Anyone ever had any luck with these? They are around $5, and it looks like you cut the strip to the length you need, so I'm tempted to order one, in case any of my second hand monitors totally fry the CCFLs, or if I come across an LCD with bad backlight from someone.

Re: Hp lw1965

the L2045w power supply PCB with one of these CPx marks circled in red.
Check point? Control point?...

Re: Hp lw1965

Thanks!

That's a good idea with the larger fuse. I don't have any SMD fuses. I just placed the order on ebay for 20 for $2 from China. The electronics distributor here wants 0,60€ plus there would be shipping at least 4€ and I don't have anything else I particularly need right now.

For now anyway the monitor isn't going to be used. I had gotten it when the L2045w display started doing the 2-seconds off deal, hoping that the seller was honest about the display working but being dim (my wife picked it up in the city and there was...

Re: Hp lw1965

I got impatient, and just shorted out the fuse. so far its working . :-)
If it fails, then at least it has a nice adjustable stand with a VESA mount. I guess I'll order some fuses off ebay though if it continues working the rest of the day.

Re: Hp lw1965

I couldn't get the two regulators unsoldered, so I just applied 5V to the input of the first, and got 3.3V out on it, 1.8V out on the next. So regulators don't seem to be bad.
Is it ever possible that just "sh*t happens" and replacing the blown fuse things will work again?

This display has the similar problem like another post on this forum for the same model of display-- backlight on, but LCD black. Following through that post lead me to take out the LCD panel and check it. Only it seems that HP changed LCD panel providers or Samsung the maker of the panel changed the driver circuit, because what I have with the Samsung LTM190EP01 panel is a different set of components. But anyway, I found that the one fuse on the driver board (F1) is blown. I didn't find any shorted capacitors, and between the terminals of the two voltage regulators (LD33 and LD18) there is some...

Re: New Members - please post your introductions here

Hi,
I live in Slovakia (funny to see post above me is from someone in the country above me!)

I am trying to fix an HP LP1965 LCD. I found two threads already in these forums, but doesn't seem like quite my problem.

-Andrew