Smasung SyncMaster 913N Monitor wouldnot display images

[selldoor]

Re: Smasung SyncMaster 913N Monitor wouldnot display images

I think buds post says somewhere we need both sides of the board. Anyway the bridge rectifier doesnt look good but it may just be the picture - looks to have heat marks and perhaps a small split? -
With no power to the board locate the 4 joints and meter on ohms 200 test 1 to2 then again with leads reversed then 3 to 4 then again with leads reversed and post result in ohms

When you remove the TOP chip test the solder joints for straight shorts.
Also look up "Dim Bulb Test" for future damage limitation

[liteace]

Re: Smasung SyncMaster 913N Monitor wouldnot display images

bridge rectifier tested with dmm in 200Ω range:

poss lead to +, neg lead to ~ = open
.neg lead to ~, poss lead to + = open

poss lead to -, neg lead to ~ = open
.neg lead to ~, poss lead to - = open

Testing the bridge rectifier with dmm in diode mode:

poss lead to +, neg lead to ~ = open
.neg lead to -, poss lead to ~ = 575

.neg lead to -, poss lead to ~ = open
poss lead to -, neg lead to ~ = 575

Ive cleaned board with brush and taken a couple more clearer pics

[selldoor]

Re: Smasung SyncMaster 913N Monitor wouldnot display images

Duh - should have said set meter to 2000 ohms.
Yes you can use diode mode as well - either way you should have 6 results (included the
check that the ~AC ~ is not shorted.
When you replaced the TOPswitch did you replace like for like (metal/plastic tab?) with any insulation sleeves/washers if there were any?.

Other places to test - Big Cap - Care High voltage - meter on 600 vDC - will doublecheck the bridge is working.

Another test for shorts on the inverter mosfets is shown here:
https://www.badcaps.net/forum/showpo...1&postcount=23
No power to the board for that test

[drac6ir28]

Re: Smasung SyncMaster 913N Monitor wouldnot display images

Hello,

Whats is thePart number for U101 on your board. Mine is damaged and I cannot see the part No.

Thank you

[selldoor]

Re: Smasung SyncMaster 913N Monitor wouldnot display images

That post is almost a year old!!!
Info looks to be here
http://electron55.ru/monitor/2-samsu...yncmaster-913n