Samtron Computers & Internet - Page 6 - Recent Questions, Troubleshooting & Support
Monitor no raster power has been ok
Hello,
The screen is blank with no raster at all. There are indications that the channel numbers are changing in the display. This indicates that some of the low voltages are present but these may be derived from the standby supply.
Assuming there is no deflection and no High Voltage, you either have a low voltage power supply problem, bad start up circuit, or bad horizontal output transistor (HOT) or other bad parts in the horizontal deflection.
Check for bad fuses.
(If you have High Voltage as indicated by static electricity on the front of the screen and you hear the high pitched whine of the horizontal deflection when it is turned on, then the following does not apply).
Use an ohmmeter to test the HOT for shorts. If it is bad, look for open fusable resistors or other fuses you did not catch.
Assuming it is good, measure the voltage on the collector-emitter of the HOT (this is safe if there is no deflection). You should see the B+ - probably between 100 and 150 V.
If there is no voltage, you have a low voltage power supply problem and/or you have not found all the bad/open parts.
If there is voltage and no deflection (no high pitched whine and no HIGH VOLTAGE), you probably have a start up problem - all TVs need some kind of circuit to kick start the horizontal deflection until the auxiliary power outputs of the flyback are available. Some Zeniths use a simple multivibrator for this - a couple of transistors. Others power the horizontal osc. IC from a special line-derived voltage. The multivibrator type are sometimes designed to fail if someone keeps turning the set on and off (like kids playing) since the power rating is inadequate.
Test the transistors if it is that type with an ohmmeter. If one is shorted, you have a problem. The usual way a TV service person would test for start up problems is to inject a signal to the base of the HOT of about 15.75 kHz. If the TV then starts and runs once this signal is removed, the diagnosis is confirmed. This is risky - you can blow things up if not careful (including yourself).
If you hear the high pitched whine of the deflection and/or feel some static on the scree, confirm that the horizontal deflection and high voltage are working by adjusting the SCREEN control (probably on the flyback). If you can get a raster then your problem is probably in the video or chroma circuits, not the deflection or high voltage.
hope this helps......
The monitor`s display adjustment panel is showin
Well for Sumsung with a 3% failure rate is unusual, I would try and reset to factory settings if that does not work, They have a pretty good waranty on them seeing they never break down. average is 3yr.
Eht current ok but not figure
if eht is ok then check the filament & voltage .
if filament is ok then check the filament (06 volt dc )
ur problem might be resolved
Hey.
The most probable cause for this is some magnetic field present near these areas, which cause the monitor's mask getting magnetized. I would guess that you have speakers on the monitor's sides, right? You need magnetically shielded (good quality "computer" type) speakers, or else move the existing ones away from the monitor.
The DEGAUSS option from your monitor's controls is used to de-magnetize the mask. You are sure to find it in the monitor menu. Or if you can't find it, simply switch the monitor on and off a couple of times (off, 10 seconds wait, on, 30 seconds wait, and so on) - degaussing is (should be) performed upon every power up cycle.
Starting problem
this is the most common problem of samsung monitor the regulator tr 7812/7805 near controller ic hv stop to work replace them by hw engineer
ur problem will be resolved................
Control is locked, how to unlock
there are four buttons on the monitor . press all four buttons simultaneously untill OSD unlocked message will appear . same procedure for OSD lock.
My monitor resolution colour is changed to pink.
Check the data-cable between the computer and the monitor, and try a different cable.
Or, try connecting the monitor to a different computer, to see if the video-card in your computer is not working correctly.
If necessary, replace the video-card.
Colours on your monitor are produced by "mixing" the 3 "primary" colours: red/green/blue in various proportions.
Or, if part of the monitor that produces one of those 3 primary colours has stopped working, then the resulting "mix" will have too much RED/PINK. Fix/replace the monitor.
I hve a sansung 48 v monitor. the screen is very
CRTs use 3 "guns" to mix the 3 "primary" colours (RED, BLUE, GREEN). One of the other guns has stopped working, leaving the RED gun as the "dominant" colour.
Spend $30, and buy a pre-owned 15" LCD monitor.
Or, spend $100, and buy a new 17" LCD monitor.
I can't open Monitor
there will be 2 plastic lugs on the top of the monitor. using a flat blade screwdriver you can undo these
Pls help me
that is a fault of yoke inside the crt monitor it should replaced by some technical person
VGA cable wire not working
At any computer retailer shop you can get it.just say give the lcd vga signal cable . you will recieve male to male cable you have to convert it by checking continuty by multimeter
Monitor color is pink at switch on. 5-10 minutes after normal
There are many things that could be causing that, but to fix it would take some electronic equipment, schematic, and know-how. It could be as simple as a faulty potentiomet, but a shop would charge you more than it's worth to fix it. My advice is to live with it until it gets too bad, and invest in a new one If you're not ready to advance to the LCD monitors yet, check with a Used Computer Store- they usually have CRT monitors at a reasonable price. Hope this helps.
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