Question about Apple M6496 17" CRT Monitor

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Snapping sound When I fire up this monitor I get a snapping, crackling sound like the flyback has a small hole in it shorting to ground. I check this out and found no such thing. Removed the crt board and still doing same. I did see some arching around the neck of the crt. Any help would be appreciated. Thank you Ron Price

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Re: snapping sound

Could have a shorted gun, or a small crack in the neck of the crt

Posted on Feb 17, 2007

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One of our samson auro d412 monitors is making a loud noise when it is powered up....any idea what the problem is

A snapping, crackling or popping sound?

One of the big capacitors on the power board is going South.

Fixing/replacing it is cheap and easy, just Google for the instructions specific to this speaker.

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L246WH Monotr makes a sizzling noise and flickers

Safety note: For best safety practice, unplug the unit immediately. If you want to try and diagnose and/or repair it yourself, at least move it to an open area free of anything that could flame up in case of sparks or a fire.

Mr. McLellen could be correct about the failing solder joints. Since the symptoms increase as the unit heats up, I suspect it is more likely an electronic component failure. The specific symptom you describe is common in transformers with electrical shorts or with a cracked frame. Insects may also be the cause. Some are specifically attracted to warmth and electromagnetic fields. To rule out insects, take sample whiffs around the vent holes on the back of the unit after it starts crackling and flickering. Electrical burns are distinct from most other types, especially roasting critters.


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Power on problem

this is hardware problem - replace flyback transformer & big transisitor fixed near flyback (replacing these two parts is compulsory ) - also check all small size transistors ( 6 to 10 transistors will be there on main board - see picture ) - below shown picture is only to get an idea as how these parts looks like & roughly where they are situated on main board ... that means this picture is not that of your monitor's main board - in your monitor there will slight difference & also that bigsize transistor's number will be different ....... for more details about flyback transformer check this link


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My Ibm monitor light blinks continously but nothing on screen and the is a clicking sound continously

There is a short within the HT section and this can be possible with the failure of the flyback transformer or the driver transisitor.
So if you are equipped please open the back panel and check for shorting on the driver, also when powered this can heat up which confirms that the flyback is shorted.
replace with the same type.

Oct 01, 2011 | IBM E74 17" CRT Monitor

1 Answer

I have LG CRT monitor 17 inch .when i switch on my crt it start sparking sound but not actual spark . the sound was so iritating & sparking shows on screen but not inside the monitor. So what was the...

You have to replace the flyback transformer of your monitor. Its a high voltage stepup tansformer which provides necessory volteges for the picture tube like Anode voltage, screen voltage and focus voltage. After some years of use the insulation stength of the flyback transformer will become bad and the high voltage will try to discharge trough the nearest ground poit. At that time you will hear the sprking sound. Its because of the high voltage Anode volt is discharing to the ground it will reflect on the screen. Using the monitor in this condition will result in the failure of horizontal driver transistor and even the power supply. Replacing the flybalck will solve your problem.

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I have a samsung monitor SyncMaster93DF it stopped completly with a little sound (tick tick ) i oppened it and found the hot transistor shorted (st2310) i replaced it with bu2527 because i couldnt find the...

try C5804 or J6812 instead of bu2527..replace IRF630 in 50 volt supply may b if problem after that then flyback transformer may b faulty. repalce it with same one.

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My HP w22 Monitor started to make a crackling sound and than all the sudden turned off, or something. It wont come back on. The computer works just not the monitor. Any ideas on how to fix the problem?

Try checking your Cable connections to the Monitor to the Computer and from the Monitor to the wall outlet.The crackling sound maybe normal.Most Monitors make that sound.

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check the vga cable if it is attached properly to your computer. Make sure that the VGA cable is connected to the Video Card that you are using.

check in the manual if you need to install the driver first.

also check if the monitor will work to another computer. If not, Then you can check the VGA Cable and replace a new one.

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the horizontal output transistor appears to be short-circuit.
the clicking noise is the SMPS power cycling as it detects a circuit fault.
the real problem here is finding out what killed the HOT, flyback transformer is the usual culprit.
Personally, i'd ditch this monitor. good quality flat screen CRTs can be had for almost nothing these days and the cost to repair this will exceed the cost of a good 2nd hand 21-22" sony/mitsubishi unit

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1 Answer

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You should replace the defective FBT.

Nov 03, 2006 | Apple M6496 17" CRT Monitor

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