Neovo f-17c has garbled image on the screen. I tested the power supply imput and it has proper voltage. I changed the VGA cable and it did not help. I took the monitor appart and the capacitors appear to be fine. I don't see any hot spots or other obvious signs of trouble.
SOURCE: 19" Proview 900p lcd monitor backlight
The 7812 device is a voltage regulator. Either the reg has failed or the input to the reg is no longer approx 12volts. It should be more than 12volts so that the reg can control the o/p .
SOURCE: LCD Monitor is black... blowing transistors
Bulging or "blown" electrolytic capacitors are a common problem with LCD monitors. If you replaced them with correct parts (voltage rating) then one of two situations comes to mind:
1. Electrolytic caps are polarized, if you install them backwards they will blow quickly.
2. The voltage the circuit provides exceeds the rating of the cap. A 5 volt cap in a 12 volt circuit will blow quickly. The voltage regulation circuit may not be working.
Monitor Mike
SOURCE: lg2234s monitor goes of blinking...cant turn
emale36, Could be problem with the "switch-mode-power-supply" inside the unit. If dc voltage rail is noisey or marginally on the low side of rated specification then strange things will start to occur on screen. Contact LG (Lucky-Goldstar) if unit is covered by warranty. The unit will need to be evaluated by technician. Visit YOUTUBE to see video clips of monitore being repaired by their owners. Read more of my profile responses to other LCD owners. 12fixlouie
SOURCE: samsung lcd 913v self test ok, no image when vga connected
This problem often occurs in samsung SyncMaster LCD monitors.
The
solution is open your look for the LCD monitor power supply module
(which have PCB connector to the AC power), on that board look for
capacitors, now look for broken one which upper part is bloated, like
the image below:
If you find a damaged capacitor as in the picture then you should replace it with the same value.
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