Hello all, I have here a 32" Lowry Tv rebadged Vestel junker. The failure here is that the standby led comes on red (standby) then goes blue (on) then shuts down back to red, what is happening is the Psu is going into over load because the mainboard is shorted. I had one of these 17MB35-4 with the same failure and never fixed it. The whole 3.3 volt section is almost completely shorted to ground very little ohms, this is abnormal. Here is what I found:
U121 Reg shorted in circuit however tests fine out of circuit.
U132 Reg shorted in circuit however tests fine out of circuit.
C308
C293
C290
C284 Ceramic capacitors all show shorted in circuit however test fine out of circuit.
All fuses are good, which isnt good because it means that the fuse has failed to protect the circuit hence Psu going into shitdown.
I cant seem to fond what part the voltage stops at as it shuts down too fast. Any help or ideas on what to test are greatly appreciated. Thank you.
U121 Reg shorted in circuit however tests fine out of circuit.
U132 Reg shorted in circuit however tests fine out of circuit.
C308
C293
C290
C284 Ceramic capacitors all show shorted in circuit however test fine out of circuit.
All fuses are good, which isnt good because it means that the fuse has failed to protect the circuit hence Psu going into shitdown.
I cant seem to fond what part the voltage stops at as it shuts down too fast. Any help or ideas on what to test are greatly appreciated. Thank you.
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