Question about Compaq TFT450 14" LCD Monitor

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Power connection pinout

Hello.

I really need a pinout in my compaq tft450 i know that it needs +5v and +12v but please could someone tell me that pinout?

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Here is a pin connection specification for the ac power supply (dual voltage adaptor)
>socket/plug for a Compaq TFT450 LCD Monitor that she
>supplied (edited for further clarity).
>
>The pins of the male connector (a PS2 mouse type connector) should be connected like this:
>
>
>
> 1 2
>
> 3 I 4
>
> 5 ^ 6
>
>
>
> GND GND
>
> 5V I 12V
>
> 5V ^ 12V
>
>
>
>For clarification - the male will be the end of your cable, and not the socket on the monitor.
>The I is the central polarising bar of the connector, and the ^ is the notch.

Posted on Aug 04, 2008

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I have a L1930b with a bad panel. I have a panel that will fit this monitor but it is an LM190E03-B4, which takes 5V input, whereas the original panel takes 12V input. The power inverter is a Lien Chang...


You can use the 5vdc from the monitor power supply
Service manual: http://elektrotanya.com/?q=showresult&megnev=lg&megnev2=L1930B%20&kategoria=&kat2=all

I look at the diagram page 31, pin 1~3 is the VCC for the panel with notes for 12/5vdc, it can be connected to the 12 or 5vdc, so it must have a jumper on the board somewhere that will let you choose 12 or 5vdc for the panel, the main thing is that the rest of the panel pins match the original panel, please verify that first.

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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1 Answer

Please how can i identify 5v and 12v terminal on the circuit board?


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Aug 25, 2010 | Compaq TFT450 14" LCD Monitor

1 Answer

Flickering


Hello,

If the screen of your monitor is flickering, this is indicating that your picture board is about to go bad or already bad, but i would suggest you replace the cable that connect to the monitor before concluding on this, if after replacing the cable, problem still persist, you will need to replace the picture board on the monitor to solve the problem.

Take care.

Jun 29, 2010 | Compaq TFT450 14" LCD Monitor

1 Answer

What connection cables?


You need a standard Male To Male Vga Cable for this monitor.

Mar 16, 2009 | Compaq TFT450 14" LCD Monitor

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Dell 1800FP, no signal found (analog). Green LED on, get message


check if your signal cable is properly connected to your system unit and make sure that non of the pins of your signal cable is broken.if any of the pins are broken,try and change the whole signal cable and re-connect it again
after following the above instruction,reboot your computer
thank you for contacting as with your problems,you are always welcomed

Jan 26, 2009 | Dell UltraSharp 1800FP 18.1" LCD Flat...

2 Answers

Gateway 900g


I'm writing this using a recently repaired Gateway 900g. You may be correct about the power supply, as that was the problem on this unit. There was absolutely no response with this unit. No blue LED, no dim display. Nothing.

WARNING: BE SURE TO UNPLUG THE AC LINE CORD. THE POWER SUPPLY HAS DANGEROUS 120 VAC PRESENT IF LEFT PLUGGED IN. If you don't know what you're doing, it's best not to attempt a repair!!!

Disassembly is a bit tricky, and there's a variety of different sized screws used; so keep track as you go. First you remove the front bezel (be careful as the two control boards on the lower right need to be disconnected). There are two screws (lower left and lower right) that secure the shell, the rest of the frame is just a snap fit around the perimeter.

Then remove the 6 screws that hold the LCD frame to the rear plastic shell. Careful here as well, as you must disconnect the back light cables AND the signal cable to separate the LCD from the Power Supply / Signal Processing board.

The Power Supply board mates to the Signal Processing board thru a 2x5 pin header. This contains convenient points to check the +12V and +5V supplies. In my case the +12V was OK, but the +5V was reading about +2.5V...not good! THIS IS REALLY DANGEROUS TO CHECK AS THE 120VAC IS ONLY AN INCH AWAY.

Here was the key symptom on my unit. Your's may not be the same. If I disconnect the Power Supply from the Signal Processing board, then the +12V and +5V read correctly (as well as the +16V that goes to the Backlight Inverter section).

However, once I connect the Signal Processing board, the +5V drops to +2.5V. However, the Signal Processing board seems to run correctly off of an external supply drawing about 300mA.

On closer inspection of the Power Supply board, I notice that 4 capacitors had buldging tops (domed). This indicated some stress. These were capacitors C205, C206 (470uF/25V) in the +16V section; and C210 (470uF/25V) and C209 (220uF/25V) both in the +5V section. I didn't have a Capacitance Meter handy, so it was simpler to just replace all four parts with similar values. (There's a lot of latitude in making these substitutions.) But be sure you have voltages a *least* greated than those needed; i.e. 16V or 5V. They used 25V to have plenty of headroom.

After replacing the 4 Capacitors, the Voltages and Blue LED responded normally. After reconnecting to the LCD assembly, all was well. Reverse the disassembly process, and you are ready to go.

nateoceanside@hotmail.com

Aug 06, 2008 | Microsoft ChiMei CMV938D 19" Widescreen...

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Power Questions for FP5315


I'm not sure about P101 and P102 but if this point is located on the controller card.But normally if connecter to LCD from controller
board then it should be a data cable and that to is not measure it.You've to really becareful for the cable that connect LCD backlight to inverter cos that is almost 1000 V!!!!
But for sure if you could mail me the picture.
ravi@technocom.co.th

goodluck,takecare.

May 08, 2008 | HP Compaq FP5315 15" LCD Monitor

1 Answer

Connection


Your HP notebook PC probably has a VGA (aka HD-15) connector. Check page 16 of this PDF to make sure - connector #2 is the VGA connector.

Your Compaq monitor also has a VGA HD-15 connector, so it should plug directly into your laptop's port after unplugging it from the other PC.

You will still need to plug the Compaq monitor's power cable into a wall outlet for power.

If you are going to share this monitor between your notebook and the other PC, you may want to consider purchasing a Keyboard-Video-Mouse switch (known as a "KVM switch") - there are many different models - you will need one with VGA, and whether you need USB or PS/2 keyboard/mouse connections depends on what your other PC's keyboard and mouse are.

Apr 06, 2008 | Compaq TFT450 14" LCD Monitor

1 Answer

PS/2 power supply connection


You seem to have an oddball monitor if what you describe is correct. The power supply to a monitor[Display Screen is that what you mean?] is either direct to main power- in which case the power cord is either built in with a power plug for wall socket, or has a socket on the back for a separate main power cord. Or is powered from a low voltage converter that delivers low volts usually via a coaxial plug like this illustration PS2 connection does dot come into the equation as far as I know unless you have got hold of something unusual. Tell you what take a shot of the back of the monitor and lets have a look see mean while here's is a shot of a typical low voltage power supply available anywhere.

May 26, 2007 | View and View Technologies VNV AquaView...

1 Answer

CTX Panoview 630 Monitor


Panoview 630 Power Connector pinouts:
It has been many years since the question was posted but who knows, maybe this will help someone. Looking at the end of the connector clockwise from 1-oclock position:
1pm:NC
3pm:+12
5pm: no pin
7pm:+5V
9pm:+5V
11pm:GND
shield is GND
+5V@3A
+12V@1.5A
(you can modify an Apple ADB cable to work)

Mar 15, 2007 | CTX Panoview 630 Monitor

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