Samsung LN55B640R3F LCD Dead/No Stby Light

[alfredomfr1]

Samsung LN55B640R3F LCD (First time for this model in the forum)

Dead/No Stby Light
AC Fuses are OK and reading only 27v.
Voltage between the legs of the big capacitors (450v, 100uf): 2.7v

[selldoor]

Re: Samsung LN55B640R3F LCD Dead/No Stby Light

If the voltage at the first fuse is 27v then your power line is out or you are measuring it wrong or your meter is broken.

[budm]

Re: Samsung LN55B640R3F LCD Dead/No Stby Light

Samsung LN55B640R3F LCD (First time for this model in the forum)

Dead/No Stby Light
AC Fuses are OK and reading only 27v.
Voltage between the legs of the big capacitors (450v, 100uf): 2.7v

You are using the chassis as the Gnd for you meter, aren't you? 27V with ref to which ground point? 2.7V AC or DC?
When you want to check the AC feeding the TV, you will measure the AC input Voltage between Line and Neutral, when you checking the Voltages in the primary circuit (the circuit after the bridge rectifier) you will use the negative leg of the main filter cap as the primary circuit ground ref point.
Something is way off some where.

[alfredomfr1]

Re: Samsung LN55B640R3F LCD Dead/No Stby Light

Elemental Watson, board broken, fixed and TV ok.
Thanks selldoor and budm