Question about Samsung HLN467W 46" Rear Projection HDTV
What are the steps to replace digital board- BP94-00385A & analog Bp94-00434A in Samsung DLP (HLN567WX)
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Posted on Jan 02, 2017
This is the digital board causing the problem, so replace that board or try this - the problem may be connections on the DNIE chip on the digital board, near the DVI connector at the back side of the board. Apply pressure to this chip. It is a BGA type (Ball Grid Array) that has pins underneath that contact points on the board. This is becoming common with high density ICs where external pin connections require larger size chips, tighter spacing, and geometries that are not efficient for the design of the chip. There are good reasons to use BGA, but they can be difficult to solder properly. Apparently, Samsung has had some issues with this chip. One solution is to try to re-flow the solder. I don't suggest this for anyone without the right equipment or trechnical expertise. It is very easy to heat the wrong parts or overheat the chip, board, or related parts. The board is encased in a metal housing with holes. Look for something that might fit between the chip and housing to put some pressure on the chip. A small bolt might fit between the chip and the metal housing above it. Fit it in, then push the edges of the housing down to where you can put the screws holding it all together back in. There will be significant tension on the bolt, with the larger hex head end standing on the chip and the tip of the screw fitting against the metal housing (bolt standing on its head on top of the chip). It will take a little pressure to get the screws back in, which is good, as it will use the housing like a large spring pushing down on the bolt, which will put a great deal of pressure on the chip. Simple solution if this is the problem.
Beach TV Repair
Posted on Jul 05, 2010
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