Sorry for the delay. Got stuck in a wormhole there for a bit.
I would start with VBOW
in category 2170D-2
in the SM.
If you can't get the sides of the screen pretty straight with one or both of those controls, then try to make the distortion as symmetrical
as possible with VBOW and LBOW, so both sides are bowing slightly outward, or slightly inward. Then you can probably fix the remaining bowing with PIN
, or possibly MPIN
. It's been awhile since I tinkered with the geo on my 34XBR800, but I believe PIN is the main pincushion adjustment for the sides of the screen (which effects the corners most), and MPIN adjusts the pincushion effect more in-between the corners on the sides of the screen.
Bear in mind that most controls in the SM are context-sensitive
, and store more than one value depending for example on the signal, zoom mode, picture mode, etc. So write down all the original values for these controls before you start changing them.
VBOW and LBOW appear to be "global" controls (ie, they only store one setting for all modes on my TV). PIN and MPIN appear to store two settings, one for the WIDE ZOOM mode on the TV, and another setting for everything else. It's possible things might work a little differently though on your TV because your 36XBR800 is a 4:3 set and my 34XBR800 is 16:9.