Re: HP ZR2740w almost dead
ok...so do you think the problem is in the panel? and the other circuits boards outside are ok?
how much are you sure? 90% 50% ?
looks like an epic work.......
wash
Member
Last Activity: 12-13-2014, 10:32 AM
Joined: 12-09-2014
Location: liguria
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Re: HP ZR2740w almost dead
vo1 30
vo2 30
vo3 30
vo4 [B]60[/B]
vo5 30
vo6 30
and all of them slowly drops....
(when i say 30, in fact it's around 28-29)Re: HP ZR2740w almost dead
vo1 30
vo2 30
vo3 30
vo4 [B]60[/B]
vo5 30
vo6 30
and all of them slowly drops....
(when i say 30, in fact it's around 28-29)Re: HP ZR2740w almost dead
vo1 30
vo2 30
vo3 30
vo4 [B]60[/B]
vo5 30
vo6 30
...Last edited by wash; 12-12-2014, 03:04 PM.Leave a comment:
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Re: HP ZR2740w almost dead
i did, but if i put the red one on vo1 and the black on the gnd, i get negative results. if i invert the multimiter wire, i get something around 30 that slowly decrease...
....Leave a comment:
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Re: HP ZR2740w almost dead
ok
with BOTH the resistor i get something around 30V that slowly drops, BUT with the ground of the multimeter on VO1 and the red one on the GND
if i use the red wire with the positive and the black on the gnd (as it should be used) the indicator goes below 0......
i never put a resistor on the vadj pin....there is a misunderstanding somewhere...
pin2 ---resistor---5v
pin3----resistor---5v
now you are talking about a resistor on the pin1 (vadj)...Leave a comment:
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Re: HP ZR2740w almost dead
yes i see the flash
i had to test the vo1 vo2...with the resistor? i removed it before testing.
now i test again.
thank you....Leave a comment:
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Re: HP ZR2740w almost dead
i really don't know
how much should be the voltage?
is there something else to do?...Leave a comment:
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Re: HP ZR2740w almost dead
no, show UNDER 0...
the indicator goes below 0, for all of them...Last edited by wash; 12-11-2014, 03:53 PM.Leave a comment:
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Re: HP ZR2740w almost dead
when i tested it before, it was 0.2 volt
i was using another ground, now using the grounds near the vo1 etc, the indicator of the multimeter goes UNDER the 0, what does it means?...Leave a comment:
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Re: HP ZR2740w almost dead
there is something we can do about it?
...
Leave a comment:
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Re: HP ZR2740w almost dead
i have to measure it with the 2 resistor on the pin 2 and 3?Leave a comment:
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Re: HP ZR2740w almost dead
the pin 1 have...Leave a comment:
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Re: HP ZR2740w almost dead
ok, it doesn't happen, no flash, nothing....Last edited by wash; 12-10-2014, 09:21 PM.Leave a comment:
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Re: HP ZR2740w almost dead
i reinsert the PS ON wire?
after i connect the resistor between the on off and the 5v i have to measure the voltage on the big caps?
done.
what should happen? nothing strange happens....Last edited by wash; 12-10-2014, 08:24 PM.Leave a comment:
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Re: HP ZR2740w almost dead
ok so i remove the cable on the pin3, then i put a 1k between the pin 3 and one of the pin 5v (pin 12-14) then i check the voltage on the 2 big caps.
correct?
done.
it stays at @400VDC...Last edited by wash; 12-10-2014, 06:51 PM.Leave a comment:
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Re: HP ZR2740w almost dead
yes the PS ON is on the pin 3, but the 5VSTBY pin....i can't find it
is the 5v-sense?...Last edited by wash; 12-10-2014, 06:21 PM.Leave a comment:
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Re: HP ZR2740w almost dead
where is it?
PS
UNBELIEVABLE! the monitor i'm using now, has died 3 seconds ago....
...
Last edited by wash; 12-10-2014, 05:46 PM.Leave a comment:
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Re: HP ZR2740w almost dead
remains at 1.8v...Leave a comment:
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Re: HP ZR2740w almost dead
i start with the monitor off (linked to ac and to pc)
it's around 320
then i click the ON button, the blu led goes on, the voltage go to around 400-410v, (the monitor flash the pc image as usual) then it drops after 2 second to 320v....Last edited by wash; 12-10-2014, 04:59 PM.Leave a comment:
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Re: HP ZR2740w almost dead
around 320 -330v....Last edited by wash; 12-10-2014, 04:17 PM.Leave a comment:
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Re: HP ZR2740w almost dead
where i have to put the ground of the multimeter? if i put the red cable on the + of the capacitor and the black (ground) in the negative, i have something more than 150v, (they are 250v caps 220uF)
this picture is ok?...Last edited by wash; 12-10-2014, 02:44 PM.Leave a comment:
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