Question about Sony Walkman NWZ-B142 MP3 Player
It's possible that the display contrast is mis-adjusted, but the Sony website does not have the user manuals posted online in English (and if I read it correctly, they aren't available in Spanish either - my Spanish is very limited, and my knowledge of Portuguese is based on guessing from similarities to Spanish and Latin), so I cannot check whether this unit has adjustable display contrast. If you have your manual available, look for the instructions to reset the unit back to factory defaults. This will probably also erase all of your music, so save a backup copy first.
If that doesn't work then:
Best case, assuming the problem isn't a low battery voltage leaving the LCD driver chip inoperable: the connector between the LCD panel and the main circuit board has come loose or has a bad connection to the panel's backplane conductor.
Bad case: the LCD driver has failed. (Replacement requires surface mount soldering expertise and equipment; may be a hard-to-find proprietary chip.) It is also possible that there is a cracked circuit board; this may be repairable without buying parts.
Really bad case: the LCD panel is broken. (Hard-to-find part.) Usually this is visible breakage, which you don't mention.
Try gently flexing and squeezing the unit, but be very careful not to apply too much force to the LCD either directly or with the bending case top. If the display shows, even briefly, then you know it's a connection problem. LCD panels generally are connected edges, so try a little pressure on the case right next to the display.
Post back if you want to dig around inside for the problem. If it's still under warranty, collect on it. Note to other readers: according to Sony, this model is available only in Latin America or Brazil.
Posted on Oct 13, 2010
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Posted on Jan 02, 2017
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