Question about NEC AccuSync 120 CRT 21" Monitor

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Help me with ma monitor

My monitors power is dead,i mean it the power led does not come on at all

Posted by NOAH TAKYI on


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Being a 21" CRT monitor (old tube type) it is going to be cheaper to buy a new LCD flat screen than to fix this one. Best bet if you do want to fix this, is to take it to a tv repair shop and let them work on it. You have not given enough information to give a good educated response to what might be causing this issue. Good luck.

Posted on Aug 20, 2007


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1 Answer

My samsung syncmaster 740n take almost 1 hr. to display after start it.

a monitor that is, its is not a computers.
so is it dead, even not VGA/DVI plugged in to a PC>
power on monitor
all monitors the sign on (with Samsung logo)
tnen tell you
NO SYNC, no SIG, or not signal, due to the cable is not plugged in
if you can push menu key 1second after turn on and that OSD screen is dead, that is a bad monitor if it is dead.
i see its old, VGA only. tell s me that.
as does model #
square screen relic.
i think this monitor is 18 years old
and us CCFL monitors, 10 year later we went to LED backlamps
yours is not LED, and has CCLF lamps that go
or intermittant
or take hours to come on.

time to retire, i because fixing it is more that new cost of a good monitor, buy one say used made in 2011, and get LED.
advance by 10 years, and win.

Jul 24, 2018 | Samsung Computers & Internet

1 Answer

My Acer LED monitor is black unresponsive and has an unchanging purple power button. What is causing this and how can I fix it?

no PC stated,
and what does this mean.
"showed nothing."
2nd monitor ,did it work on not? please be clear.
I guess you mean the 2nd monitor works on this unstated PC.
but not the 246 ,as it is dead. or shows odd things? no photos off odd presented,
246, is 6 years old today.

ok , PC dead, but is it silent, it must blow 2 fans desktop.
ok, does the GN246HL fail on other PCs.
if not it is good.
if yes,it is bad, simple no?
all test monitor directly to a PC, DVI jack.
this monitor is only 6 years, old and is LED backlighted

what does this mean?
Dual Link DV-I.??????????
this monitor has only one DVI port (and vga , and HDMI)

now test 1.
NO pC connected
power on the monitor,
it shows LOGO sign , ACER logo message seen for 6 long years but today is dead.
Now turn it on again and push menu button, on monitor.
you get OSD screen windows, from the monitor brain and it works
and looks good , but only for 10 seconds at power on.
the 10 second rule on OSD, means you must do that fast.

the controls are in the manual
page 22

May 13, 2018 | Acer Computers & Internet

1 Answer

Pc not booting

If you hear the CPU fan turn on that doesn't mean the CPU itself is working. It can be only that the motherboard is getting power. Check all your connections such as monitor and peripherals and re-connect them. If you still don't get P.O.S.T. or ANY letters or boot options on your screen then your CPU is dead. (unless your monitor is bad)
Another easy diagnostic is using your ears. For example the pitch sound of the fan in some motherboards tends to lower and then increase because it's reading of the hard drive. This means your CPU is ok but either your graphics connection is bad or your monitor is.

Apr 22, 2012 | Intel Motherboard

1 Answer

My scepter e240 wont power on is it junk or what


first of all, check whether the power on/off button light (LED) turns on or not. If it goes on either orange or yellow/green, it means its not completely dead. If its not doing that then its a different matter.
Then you have to check the power cord that can be problematic and need replacement. If it is ok then you have to disassemble your monitor to check the inner fuse that is related with the power supply.

Most probably it is cause by the Capacitor, if it is dead and after checking the fuse!

best of luck!

Mar 31, 2012 | Sceptre X5g-Komodo VII 15'' LCD Monitor

1 Answer

I fixed my broken HP L1906! Couple new capacitors in power supply board and it could be powered up. Green led (for power) is on, monitor begin to circle 18 times - red, blue, green white horizontal...

BUT NO PHOTO POSTED, worth 1000 words each,
can be lots of things ,
bad power supply, something shorted. caps but in backwards.
+ to + and - to - works only. or the short. every time.
there is no schematic,
leaving what?, guessing ? and buying used parts on ebay
expensive to do that.
i presume the OSD button is dead ,right?

the power button tells you its a hard failure, it did.

The L19xxxx has CCFL back lamps, most did.
so seems they work ok , to see color takes that working.
but power is first ,that mean not just 5v.

Jul 31, 2017 | HP L1906 19" LCD Monitor

2 Answers

Compaq presario s5100nx won't power on

no monitor stated, ! wow. (hard to help this)
generic PC 101:
1: test this monitor on any other PC.(vga)
2: test this PC on any other VGA monitor .
either test above quickly proves which end is bad.
easy no?, just one simple test and 1/2 the causes go byebye...

if the PC goes dead the monitor goes to sleep mode. and HP monitor shows yellow power. lamp.

I will do simple monitor tests now
even with NO PC connected. (basics)

1: most monitors will even a sign on message, with no PC.
a HP logo graphic, Compaq logo shows. or some text.
newer monitors show logo message "energystar" every time.
then shows..... (the last means PC is setup wrong)
errors. then goes black.

if it shows nothing ever, the monitors 15 year old
CCLF tubes inside are now dead, 99% are now.
the LCD back light lamps died long ago , on most.
if the back lamps are good from year 2003,.wow
then.... (like finding 1995 car that runs)

the monitors OSD screen on most will work now.
on demand !by YOU.
for a few seconds, lacking a PC connection.
power on and hammer the menu key see OSD.? even for 1second.
This works best with working PC, the OSD will not work at all with a dead PC but some screens can be tricked into showing the OSD for few seconds at power on, no PC conn., (it's super good to know these facts,when screen is dead or partly)

you asked about the magic batteries. (cake walk)
well sure, all 15 year old PC have bad RTC coin cell battery on the DESK top , inside mother board.
if never serviced for 15 years it is bad.
replace it, (below 2.9vdc is bad battery(metered)
remove it look at number and get one at walfart.
2032 cells are common

(camera dept, or watches)

my nice test monitor (tech)
HP lE2000x (led) nice and small.
power on (no PC connected)
blue lamp power button glows every time it gets power.
Large menu pops UP, shows scanning VGA/DVI and more for 2 to 3 seconds
then a large white menu pops
and shows "monitor going to sleep" in clear English. (means PC is dead , this case missing)

the blue led power lamp goes from blue to yellow
and screen is now black. (all 100% normal)
these are what all LCD do powered on.

if the monitor is totally 100% dead all ways from Sunday, then it is. as all are now with CCLF tubes
99.9% are dead, if used.
the lamps last 20,000 hrs and DIE.913c8268-90a1-42b6-be05-ed78514f589e.jpg

Jan 08, 2018 | HP Compaq Presario S5100NX (DM172A#ABA) PC...

1 Answer

Dell monitor e17s fbp.. wont turn on

Flashing power LED light means you may have shorted (Emitter to Collector) out transistors (c5707) or bad fuse (fuse has high resistance) PF751. Those are what you need to check. see pictures here:

Post back what what you find so we can guide you further.

Feb 27, 2010 | Dell E173FP 17" LCD Monitor

1 Answer

Doesn't respond

Compaq MV 540 (old dog monitors) DEAD 100% DEAD.
OSD dead too. it seems.
built in year 2000, its 17 years old, and you fix things that old
why> why do that, used LCD can be had for 20 bucks.
why slave over any relic CRT like this,,, for a musiem??
using the VGA cable
the monitor will go to sleep, lacking any PC sync lines Vert/horz
by design per VESA rules on that !
step one , use a PC.
set the PC up to do the max resolution on the CRT
some PC cant do that, (new PC)
im reading your users guide now, 1sec, google , hit.
first force the PC to 1024x768 resolution and 60 vert. refresh max.
now the CRT can work an not any of above number higher .
see? use working monitor to do that FIRST.

now plug in the vga,cable last. on the monitor under test.

power led means
green = power ok
amber or yellow are sleep or standby.
so that means, there is no sync.
or if the OSD works (does it>) turn the silly sleep timer off in the monitor. via OSD .

the operators guide, tells you to go to PC safe mode.
this mode sets reso real low. 800x600 and all monitors work there.
no sleep timer inside monitor i can find.,

lots of ways for any CRT to fail even the CRT itself
(loss of sweep)
loss of cathode video drive
the VGA card inside, can fail. killing dead all cathod drive.
the power supplies or regs inside can fail.
the HV can fail. 10,000 volts (dont touch it if long life is good)
some survive, or fly back hit head on wall and crush skull,
seen it and done it so,,, there you go.(ripped gash in arm once)
the 2nd anode is very high voltage, avoid it, and win,.
respect it.

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8 Answers


if the monitor green led is blinking continuosly the follow the steps remove the cable of the monitor which is connected to the CPU and watch the monitor it should show a message ( no input signal or cable disconnected, that means your monitor is OK the problem is with your CPU . try this and let me know

Oct 10, 2007 | Computers & Internet

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