HP lp3065 repair or part source.

[zvaniel4o]

Re: HP lp3065 repair or part source.

Hello guys!! My father in law has the same monitor. The unit was not powering on, anyway after disassembling I noticed that some capacitors were having a loose solder connection, I re-soldered them and now the unit works. There is a one issue though - it has vertical lines. What can the reason be, damaged LCD, damaged LCD controller, power supply, does anybody have a clue from where to start?

[t256]

Re: HP lp3065 repair or part source.

Replace SMD fuse F1 (2A) on the PCB LCM

[paboman]

Re: HP lp3065 repair or part source.

Im also interested in the ending.
thx!!

[rswails]

Re: HP lp3065 repair or part source.

Did you figure this out? What is the conclusion? lol I just read this whole thread and didn't like the ending!

[KhitSicker]

Re: HP lp3065 repair or part source.

Should I just give up on this and part out the monitor at this point? Or does anyone have a sorce for lcd logic boards.

[KhitSicker]

Re: HP lp3065 repair or part source.

OK now find those same pins on the logic board. See if the voltage changes at the logic board connector, there is a possibility of a broken wire.

Thats is where I tested them.

They did twitch when I tested them with the Ohm meter setting but not when I tested for voltage.

[alexanna]

Re: HP lp3065 repair or part source.

for shits and giggles i tested for voltage on the ground pin and the "on" pin with the power on and the voltage is 0 both at rest and when the button is pressed.

OK now find those same pins on the logic board. See if the voltage changes at the logic board connector, there is a possibility of a broken wire.

[KhitSicker]

Re: HP lp3065 repair or part source.

ive heard of people baking electronics in the over .. 385 degrees for 8-10 min to reflow soldier joints and the like. is there any valadity to that and does anyone reccomend I try it?

[alexanna]

Re: HP lp3065 repair or part source.

The result is the same as when i tested it the first time. no voltage change on any of the front panel pins when the power is on and the button is pressed. This is with the black probe in a ground screw and the red probe testing the front panel pins on the logic board.

Now I was able to identify the ground pin and when i am testing with the ohm meter with the black probe on the ground and the red probe on the pin ive identified as the front panel there is a change when the button is pressed.

for shits and giggles i tested for voltage on the ground pin and the "on" pin with the power on and the voltage is 0 both at rest and when the button is pressed.

Well then there's a problem with the voltage not changing,
Unfortunately I have a pain level of 10 and a concentration level of 0.
I can suggest simple things to check but I'm unable to walk you through it.
Hopefully someone else will jump in and walk you through the tests.

[KhitSicker]

Re: HP lp3065 repair or part source.

Follow the instructions in post #22
That’s explained in the last paragraph

The result is the same as when i tested it the first time. no voltage change on any of the front panel pins when the power is on and the button is pressed. This is with the black probe in a ground screw and the red probe testing the front panel pins on the logic board.

Now I was able to identify the ground pin and when i am testing with the ohm meter with the black probe on the ground and the red probe on the pin ive identified as the front panel there is a change when the button is pressed.

for shits and giggles i tested for voltage on the ground pin and the "on" pin with the power on and the voltage is 0 both at rest and when the button is pressed.

[alexanna]

Re: HP lp3065 repair or part source.

Follow the instructions in post #22
That’s explained in the last paragraph

[KhitSicker]

Re: HP lp3065 repair or part source.

Could you measure the on/off pin again but check the voltage, I'm interested in how much the voltage raises.
I'm thinking PlainBill is asking about those three legged ICs, Hoping there is a possibility one may be a reset controller. Try to find a good magnifying glass see if you can identify the numbers on them.

Do you want me to check the pins with or without the power on. and with the front panel plugged in or out of the logic board?

[alexanna]

Re: HP lp3065 repair or part source.

Could you measure the on/off pin again but check the voltage, I'm interested in how much the voltage raises.
I'm thinking PlainBill is asking about those three legged ICs, Hoping there is a possibility one may be a reset controller. Try to find a good magnifying glass see if you can identify the numbers on them.

[KhitSicker]

Re: HP lp3065 repair or part source.

well i guess it was ohms that i was measureing then. never used that setting before.

[retiredcaps]

Re: HP lp3065 repair or part source.

You can't measure voltage with your multimeter when it is set to any ohm setting. Maybe you might a typo in post #40?

[KhitSicker]

Re: HP lp3065 repair or part source.

When I said 2k I was refering to the setting on the multimeter. This is the multimeter I have. On the OHM section i set the dial to 2k. You cant see it in the pic but the settings are 200, 2k, 20k 200k, 2m


Not my pic by the way but its the same model mulri meter i have.

[retiredcaps]

Re: HP lp3065 repair or part source.

With the ohm meter on 2k the voltage goes up to ~1.09 then falls to .000 within 2 seconds.

If you are measuring voltage with your multimeter set on 2k ohms, you are

1) measuring it wrong
2) not getting an accurate reading
3) may potentially damage your multimeter

You would need a very special multimeter in order to be able to measure 2k volts if your multimeter goes that high. Most multimeters only go to 1000V DC.

[KhitSicker]

Re: HP lp3065 repair or part source.

As long as the 'bulge' is a camera artifact, don't bother replacing them. It is very unlikely they would be the cause. There is anotherf point I would like you to check, however.

There are a number of 3 pin devices that have caused problems on other boards. Two of them are near P305. They are I323 and I306. Others are I320, I315, and I316. What are the part numbers of these? Don't worry about similar devices with identifiers that begin with Q and D.

PlainBill

I cant really see. There is writing but its too small and faint to make out. How should I test those to see if they are working?

The question was more out of curiosity; if you haven't totaly given up on it, or have time it would be interesting to know.

With the ohm meter on 2k the voltage goes up to ~1.09 then falls to .000 within 2 seconds. This behavior is repeatable.

[alexanna]

Re: HP lp3065 repair or part source.

I dont remember what the numbers were off the top of my heat. But I do remember the numbers comming off the pins on the front panel board were the sames as comming off the p307 connector on the logic board.

The question was more out of curiosity; if you haven't totaly given up on it, or have time it would be interesting to know.

[KhitSicker]

Re: HP lp3065 repair or part source.

How much did the voltage increase on the on/off pin when you pushed the power button?

I dont remember what the numbers were off the top of my heat. But I do remember the numbers comming off the pins on the front panel board were the sames as comming off the p307 connector on the logic board.