Question about Sony SDM-HS73P 17" LCD Monitor

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G board Where did you find this g board thing? I fix loads of Sony 19'' and 17'' , and they have inverter, when they are like this , it is either the inverter, the lamp, or the connector. I think the problem became quite confused here. Thanks.

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  • Ginko
    Ginko Dec 30, 2008

    I know, I was the one generating confusion, now everything is clear.

    The inverter had been designed on same board as psu, and that is called G board, not a very bright idea by sony engineers.

    good luck all with the user.


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g board - 00bf25f.jpg

Posted on Dec 29, 2008

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Sony Bravia KDL-52XBR TV - have sound but no picture

Hi mstevens376,
Power on the unit in the dark room then shine with the flashlight directly in the screen, you will barely see the images. This is because your backlight is not functioning. The following reason is the caused.
1. Power supply - missing B+(supply voltage) coming from this board feeding the inverter board. This is caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible resistor.
2. Inverter board - even the B+ is good from the power supply, if the fuse, driver transistor, driver transformer is faulty no output to the backlight resulting to black picture.
3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.
Diagnosing the fault is technical and if you don't have necessary tools and test instrument and can't fix it yourself, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Mar 31, 2011 | Sony KDL-52XBR4 LCD Monitor

2 Answers

Monitor hpvs17e stays on for second and goes blank

gldngrlz411, most likely problem with internal "switch-mode-power-supply" / CCFL inverter supply that provides 600 to 1000 volts ac to light the CCFL tubes that provide "white light" so you can see what is on the glass LCD panel!! Explore here first: http://www/ If vs17e does same when connected to a different "known good" pc, then you will need to make big decision!!! FIX or Trade in for new wide screen unit. 12fixlouie

Oct 08, 2010 | HP Vs17 17" LCD Flat Panel Monitor

1 Answer

Same issue. 5VDC & 15VDC OK even when CCFL's go off. New 1,000uf/16VDC cap. Just prior to going out screen starts to flicker slightly. Can't see any bad solder joints on the power board. Any hints?

The 1000uf/16vdc caps are for the 5vdc logic, there should be at least tow caps rated at 25vdc for the 15vdc inverter circuits. Try using 1157 12v car lamp attache to the 15vdc, the power switch will have to be off (the 5vdc and 15vdc are always on) so the inverter circuits will not be drawing the current from the 15vdc power supply, the 15vdc should be at 15vdc +/-1~2v with the lamp load. If it is steady, then you still have problem in the inverter circuits which can be the lamp assemblies, inverter transformers, Transistors/IC. I use test lamps set up to narrow down the problem to find out if it ia the lamps or the inverter circuits.
Failed TV and Monitors:

Service manual:

Sep 10, 2010 | Sony SDM-HS74P/S 17" LCD Monitor

1 Answer

Hello!Sony SDM-HS73 power-inverter problem

At this point you may have bad transformers, bad tuning cap, you need to check the frequency of the inverter oscillator to see if both of them are running at the same frequency, the bad one may not be. The Inverter/power supply is not made by SONY, Powernet makes the board. Please see what went wrong with the one I fixed.
One thing to keep in mind, when the board turn into carbon (blacken), it will conduct. The circuits operate at high voltage and high frequency.

Apr 09, 2010 | Sony SDM-HS73/H (Grey) Monitor

3 Answers

Hp vs17e powers up, goes on... goes off
It seems to be a capacitor problem.
Follow the link above. I have the same problem. I have not done the fix yet but tomorrow I will solder and test.
Good luck.

Aug 21, 2009 | BenQ FP737S-D 17" LCD Monitor

2 Answers

HP vs17e monitor goes black after 2 seconds.

With the dropping price of monitors today; can get a good 22 inch lcd for less than $200 in most stores, it would probably cost more to have the old monitor repaired than just replace with a new monitor.
thank u
rate me

Jul 19, 2009 | HP Computers & Internet

1 Answer

Blank Screen

This is the power supply/inverter board that is failing, or has failed. This is the symptom, but it usually fails slowly - for example, it may take a few seconds to come out of powersave mode...then a minute, then 10 minutes, then an hour.

It's usually caused by the capacitors going bad, and if one is bad, it can take out some of the others, which is why it usually is a slow process to fully fail.

You can purchase an inverter board online - do a search for dell inverter boards, there is a couple of online resources, and they are usually around $50.

You can try opening up the monitor and pulling the inverter board (I'd only do that if it's out of warranty, and you don't mind taking a HUGE risk wrecking the whole thing - they are not very easy to disassemble) and replacing the capacitors - only if you have some electronics skills and can solder. The capacitors, which usually are the culprit, are probably less than $1 each, but replacing them isn't a guarantee to fix it, there may be another component on the board that has failed as well.

The cost of the inverter board is almost as much as what you can buy a used monitor on ebay for. It may not be worth it to try to replace the parts unless you're adventurous.

Jun 05, 2009 | Dell E152FP 15" Flat Panel LCD Monitor

1 Answer

Monitor has power only, no display. Serial #08138JA019415. Product Name LM729.

ok, your monitor problem is the inverter or lamps is not working well. you need do:
1) first thing you need check power board capacitors if there is any swelled it should replace. check all DCoutput voltages like 5V/12V etc. normall
2) check the inverter board it can maks this problem
3) if inverter works normall that is lamps at downside getting old, need to change.
hopeful all thing you can do it well
hope this help you fix it, please rating me thanks

May 14, 2009 | AOC LM729 17" LCD Monitor

1 Answer

Sony SDM-HS73P, Ekaitz.

Hola Ekaitz,

La tarjeta publicada es un inverter board para el modelo de 19 pulgadas.

Ante de comprar asegurate que la placa sea la que monta en tu modelo.

El G mount indicado del otro experto es otra parte, un inverter no cuesta mas de quarenta o cinquenta euros, y por un Sony como el tuyo deveria de ser como veinte o treinta.

Tienes dos manera de encuentrar el replacement.

O tomas los numeros impresos en la placa, o llamas por telefono el vendedor.

Puedes contactar Shopjimmi en ingles.

Lo mejor es contactar Sony Sony Direct Accessories & Parts Center deberian de hablar Castellano.

Perdona por las faltas, no tuve tempo para ir a la Academia para mejorar my Espanol, y en el teclado ingles me faltan letras(n) y acentos.

Dec 29, 2008 | Sony SDM-HS73P 17" LCD Monitor

2 Answers

17" Sony monitor black, on/off switch yellow

It's seems your backlight inverter finally burnt out on ya... Need to replaced a new inverter or you can repaired yourself and show your hubby who the boss in the house...hehehe... Only need to replaced a couple of capacitors...that cost about $10 bucks! Well...good lucks!

Aug 26, 2008 | Sony SDM-HS73P 17" LCD Monitor

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