Problems with Samsung 740N monitors

[grade]

Re: Problems with Samsung 740N monitors

my samsung 740n is dead

[PCBONEZ]

Re: Problems with Samsung 740N monitors

Fuse here;

[cynz]

Re: Problems with Samsung 740N monitors

Tanks for all the guys here. I got really helpful info here during the DIY for repairing my Samsung 740B.
Right now, I got my LCD work and go well.
What I did is:
a) replaced three 820uf 25v caps beside the transformer
b) unsoldered the green small 3A fuse beside a 820uf 25v cap, then solder a solid wire into it.(as i don't have any alternation one in hand, but it is risky)

As a result, bad caps always play the key role and induce the fuse burnt.
New discovery: OEM used the same model power board in IBM L171p LCD, which means samsung made PBD for IBM monitor as well.

[jetadm123]

Re: Problems with Samsung 740N monitors

Tanks for all the guys here. I got really helpful info here during the DIY for repairing my Samsung 740B.
Right now, I got my LCD work and go well.
What I did is:
a) replaced three 820uf 25v caps beside the transformer
b) unsoldered the green small 3A fuse beside a 820uf 25v cap, then solder a solid wire into it.(as i don't have any alternation one in hand, but it is risky)

As a result, bad caps always play the key role and induce the fuse burnt.
New discovery: OEM used the same model power board in IBM L171p LCD, which means samsung made PBD for IBM monitor as well.

Hopefully, you'll reconsider and use a real fuse versus a plain wire. Fuses are used for a reason.

[enghijjawi]

Re: Problems with Samsung 740N monitors

thanks for all guys here

I have SyncMaster 730B, its board model IP-35135B, for few days looking for its schematic
please if one have service manual for 730B

i download service manual for 740N and its schematic different and not match.

[PlainBill]

Re: Problems with Samsung 740N monitors

thanks for all guys here

I have SyncMaster 730B, its board model IP-35135B, for few days looking for its schematic
please if one have service manual for 730B

i download service manual for 740N and its schematic different and not match.

Service manual here.

PlainBill

[enghijjawi]

Re: Problems with Samsung 740N monitors

Sorry to bother, I'm new to the site
I hope it helps me find a way to download the file where the site is in Hungarian (translate it to english through google translate) and tried to register but only rejected a joint invitation from someone Active
I hope that helps me
Accept my profound thanks and appreciation

[PlainBill]

Re: Problems with Samsung 740N monitors

Sorry to bother, I'm new to the site
I hope it helps me find a way to download the file where the site is in Hungarian (translate it to english through google translate) and tried to register but only rejected a joint invitation from someone Active
I hope that helps me
Accept my profound thanks and appreciation

The site is located in Poland.

Menus are in Polish and English.

Registration is not required.

Steps:

1. Click on link.

2. Click on blue arrow next to Samsung 730BF. A new page opens.

3. Click on Get Manual upper left part of page.

PlainBill

[enghijjawi]

Re: Problems with Samsung 740N monitors

Hi, PlainBill
Thank you for your help and your answer

[PlainBill]

Re: Problems with Samsung 740N monitors

Hi, PlainBill
Thank you for your help and your answer

Je vous en prie!

PlainBill

[celtronics2011]

Re: Problems with Samsung 740N monitors

Samsung LCD 740nw Led flashes and no picture
Hello ... The problem I have with my monitor is that when connected to the grid is turned on the power button is blinking and not showing me anything on the screen even in a message that has no connection to the pc. Thanks & Regards .........






help

[PlainBill]

Re: Problems with Samsung 740N monitors

Samsung LCD 740nw Led flashes and no picture
Hello ... The problem I have with my monitor is that when connected to the grid is turned on the power button is blinking and not showing me anything on the screen even in a message that has no connection to the pc. Thanks & Regards .........

help

1. Do not post pictures inline. Use 'Manage Attachments' - below the text entry area.

2. Do not use pictures you found on the internet. The first one has obviously defective caps. The second shows only a fragment of the power supply.

PlainBill

[celtronics2011]

Re: Problems with Samsung 740N monitors

hello apologies
Some possible solutions
where to begin to test
all coils are in perfect condition
status as verefico (dm0465)???
thanks

[PlainBill]

Re: Problems with Samsung 740N monitors

hello apologies
Some possible solutions
where to begin to test
all coils are in perfect condition
status as verefico (dm0465)???
thanks

Start by replacing all the electrolytic caps except C105? (the big yellow one). At least two of them are defective.

PlainBill

[celtronics2011]

Re: Problems with Samsung 740N monitors

problem solved
capacitors were only 10v/1000 microfariados
thanks

[jossuez]

Re: Problems with Samsung 740N monitors

Hi everyone!! I have a problem with my Samsung 743NX

https://www.badcaps.net/forum/showthread.php?t=16559

Any suggestions?? Thank you very much!!

Joss.

[PlainBill]

Re: Problems with Samsung 740N monitors

Hi everyone!! I have a problem with my Samsung 743NX

https://www.badcaps.net/forum/showthread.php?t=16559

Any suggestions?? Thank you very much!!

Joss.

Three suggestions:

1. Stop hijacking threads.

2. Don't double post.

Either of these will cause some people to ignore you.

3. Follow Rtech's advice.

PlainBill

[jossuez]

Re: Problems with Samsung 740N monitors

Three suggestions:

1. Stop hijacking threads.

2. Don't double post.

Either of these will cause some people to ignore you.

3. Follow Rtech's advice.

PlainBill

Oh i'm so sorry Thanks for the suggestions, I'll do.

Joss.

[jmcasa]

Re: Problems with Samsung 740N monitors

Hi

I'm new here and I'm looking for a solution for my 740. After I turn on the monitor it only shows the image for 1 second but blue led is on. The problem is that my power board is not exactly the same as posted here, my power board is BIZET-17A, REV:1.0A 2005.1.20 BN44-00123A. Components are not the same, I don´t have mosfet, caps 820, pico fuse... and design is different.

Anybody can help me?

Thanks in advance!

[retiredcaps]

Re: Problems with Samsung 740N monitors

Anybody can help me?

1) 2 seconds to black can be

a) bad caps
b) bad inverter transformer
c) bad ccfl and/or wiring

All are discussed in more detail in posts #13 and #14 at

https://www.badcaps.net/forum/showthread.php?t=10419

Also please read misc suggestion #1.