help on LCD problem: no display but has power

[ethzneuron]

mga bro, mangayo ta og tabang sa mga kabalo mo-repair diri og lcd monitor. ^__^

my nephew has this almost 3-year old na viewsonic VA1703wb 17" lcd. karon kay dili na ni mo-display but ang iyang power on led kay siga man. checking the insides kay naa koy nakita nga niburot nga caps then ako giilisan, pero mao lang gyapon. dili gyapon mo-display but power led is on. wala nako nipadayon sa lcd panel na gyud kay murag di na kaya sa ako powers sa karon... pero kung naay motudlo, mas maayo.

sa mga mangayuhay diri og lcd, unsa kaha guba nga component ani?

the ff pics are from the lcd supply and the vga input board.


ang burot nga caps, para nako okey ra ni but la naman ko lain ilisan gud.. la koy tester.


the vga input board


the supply board

[beloyski]

Bro, fixing electronic parts w/o a tester is like taking an exam w/o a pen.

It's a big plus that you know how to disassemble the parts and analyze the components. Use a tester to read the components para ma detect gyud nimo unsa ang daot. Lisod nang mag mata-mata lang.

Good luck fixing the LCD monitor.

[jOaL]

Bro, fixing electronic parts w/o a tester is like taking an exam w/o a pen.

nice one... maestro man ug answer si sir beloyski.

[yugi]

@ethzneuron: better dal-a na sa service center jud para di mo samot ang problem, pangita lang ug service center na no fix no pay. You shouldn't fix that by your self without a professional experience, like what beloyski said to you it just taking an exam without a pen and enough knowledge.

Suggestion lang na!

[coolnezz]

have you tested the Viewsonic LCD on another computer?
have you tested the computer's GPU w/ another monitor?
if you're sure it's not the video card then my guess is the inverter not supplying enough voltage.
check the FETs and Semiconductors.

[pinuno]

3yrs is enough...pulihan nlng na ug bag-o! LCD 17" nowadays cost only 5T+

[ethzneuron]

@beloyski, lisod gyud bro.. hehehe. mas maayo pa gyud kung naa koy ESR meter.

@yugi, tester ray wala nako bro. i once worked as a tech sauna but not computer parts. mao la ko nahadlok mo-abli ani. ^__^ gusto lang pod ta ko makat-on og repair og lcd.

@coolnezz; yes bro natest nani sa lain nga pc - duha gyud kabuok. onboard video ra man ni amo pc bro.. yea, i wish i could test does parts..

thanks sa reps guys.. kinsay kamao mangutingkay og lcd diha, share pod tawn mo..

[moy2]

ahihihih sus sayanga.pru kun pa ayu na nmo bro naa ko kaila bro.tga LG

[Blomax]

in my opinion mga bro... kani ako suspect ana ang data cable niya basin dli ciya ka recieve ug data mao dili ciya maka display sa imong monitor.... maybe naay loose contact ana... naa man kaha power...

[ethzneuron]

i'll double check on this bro.. pero gahi man gud kaayo ni kung itaud ning header pins, pero bisag sa side sa lcd panel.