Samsung Syncmaster 242mp
PSU model: PN120LPS-VF rev 2.0
Code: BN96-01849A
Mainb model: P024FS
Code: BN41-00552C
Description of problem/defect:
Monitor works fine at all inputs if leaved unplugged for 2hrs+, until power off. It will not power up again unless it has been unplugged for those 2hrs.
What i have done/measured:
Changed a bunch of caps (bottom leakage). Reheated/solder entire PSU. All this whitout any positive effect.
Measured at full function:
392v at big 450v/150uf cap
24v to inverter
12v and 5v to main
all ok
Measured when refusing to power up:
306v at big cap
18v to inverters, slowly dropping to zero!
12v mainb feed measures zero
5v mainb feed is fine.
I have not been able to find any schematics for the PSU. I have very little knowledge of how such PSUs work.
Supplied form wall is 240v/50hz.
PSU model: PN120LPS-VF rev 2.0
Code: BN96-01849A
Mainb model: P024FS
Code: BN41-00552C
Description of problem/defect:
Monitor works fine at all inputs if leaved unplugged for 2hrs+, until power off. It will not power up again unless it has been unplugged for those 2hrs.
What i have done/measured:
Changed a bunch of caps (bottom leakage). Reheated/solder entire PSU. All this whitout any positive effect.
Measured at full function:
392v at big 450v/150uf cap
24v to inverter
12v and 5v to main
all ok
Measured when refusing to power up:
306v at big cap
18v to inverters, slowly dropping to zero!
12v mainb feed measures zero
5v mainb feed is fine.
I have not been able to find any schematics for the PSU. I have very little knowledge of how such PSUs work.
Supplied form wall is 240v/50hz.
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