What other piece of hardware could have gone bad? tv: PN43D450A2D psu used: Samsung BN44-00442A (PSPF271501A) Power Supply Unit
Make a couple tests and you can determine if you received a bad power unit or if you have other issues...first measure the pin marked PSON and see if that voltage goes up to about 3.5 volts when you turn the set on, if it does then the main-board is working ok and telling the power supply to come on and you received a bad power board, if that voltage isn't what it needs to be chances are the power board never was bad and you needed a new main board...good luck!
SOURCE: Looking for SK-26H520S Power Supply Unit
I had a similar problem where the TV would turn on then shutoff when bumped or over time. The clue was a "tick" sound when it shutoff. Unplugging and reconnecting the power cord go it going again for a few minutes anyway.
I took the unit apart and found the solder connection on the power supply unit was cracked where the main transformer attaches. The solder connection joins the PC board. I suspect the weight causes the joint to stress crack. This is easy to fix by removing the power supply and touching up the solder connections around the transformer. I'd check this first as it is very difficult to locate power supplies and other parts.
SOURCE: Dell Inspiron 530. No power - replaced Power
hi,
Sadly that sounds like a dead motherboard.
Regards
Gewiz
Testimonial: "Very quick response, greatly appreciated. "
SOURCE: Originally I had a problem with my Viewsonic
no it sounds like you probably didnt need a new power supply but simply needed to check your fuses this error normally occurs when a fuse or capacitor has blown and will either be really cheap or really expensive to fix depending on which it is the fuse change should be possible on your own but running a diagnostic to find out which circuit has a blown unit would require some technical assistance and tools
hope this helps
Robb
SOURCE: I plug it in, and the fans spin briefly, but the
Because the capacitors in the PSU retain a charge, the LED lights will glow after the power is switched off, these will fade out after a few seconds.
It would appear that at first glance, the PSU is indeed bad and the only way to eliminate this is to replace it with a known working one (I'm also assuming that the 4 pin yellow and black CPU plug that comes off the PSU is plugged into the motherboard?)
If this works than it was your PSU
If it does not work, there are several other possible reasons why this is happening:
Before doing the tests below, physically inspact the motherboard. Look for blown or buldging capacitors (the small cylinder objects), brownish residue, bulging sides etc are symptoms of a dying mobo. Check there are no objects causing a short on the board (you may need to remove the board to check) also, check the brass standoffs are not contacting the uninsulated parts of the board
SOURCE: xvt473sv is plugged into a
Since you do get some indicator on the TV, it means that the standby power supply is working but the rest of the power supply may not be.
The main board processor may have gotten corrupted, I would try unplugging it for about an hour to let it reset itself to see if it will work. If it still not working, then the power supply module needs to be checked out.
Please read my guide first so you will know what to look for.
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
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