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Equipment Repairs => LCD TV forum => Topic started by: markc on February 08, 2011,10:54:35

Title: Samsung LE40R51
Post by: markc on February 08, 2011,10:54:35

Hi,
I have one of these  in for repair. The screen goes black after 1 hour+. The inverters have turned off.
The voltages apear to be the same with the inverters on or off. I have replaced both inverters & still have the fault. Can anyone with a suggestion as to where to look next?

Thanks
Mark

Title: Re: Samsung LE40R51
Post by: Synyrgy on February 17, 2011,11:53:11

Samsung unit have always suffered from poor ventilation. most inverter components are rated between 85 and 105 C. Try an experiment? Remove the back cover and place a fan on the unit. Leave fan on high moving as much air as possible across the back of the system. Turn it on and leave it on for several hours. If it functions properly; You will need to modify the chasis and increase the venting to help with this problem. :thumbup:

Title: Re: Samsung LE40R51
Post by: sparky on February 17, 2011,12:06:03

hi
do any of the caps look like they are bulging in psu  if so replace them,
was the inverter panel new? also check psu for dry joints
dave

Title: Re: Samsung LE40R51
Post by: GGTVBD on February 18, 2011,06:04:47

Especially the inverter transformer on the power supply (drys).