Re: Viewsonic Q19WB

The Problem was the power shut off after 1 sec

The fix I only had to replace 1 CAP , I have Been replacing with similar farads MORE voltage to insure LIFE

Look at the middle of the board closest to the inverter ...That was the cap for me

Many problems result in power failure, I was lucky to spend 20$ on this monitor spent 30- min to an hour to fix great deal.

Re: Hanns-G HU171D & 171A - Blank (white) screen... both of them.

I have connected a mag and dell LCD screen in testing purposes.
Both power on FIXED WHITE SCREEN both manifactured by phillips

Problem 2 the cause, the voltage going to the monitor is low and weak
the high pitch squeal is the Power Board and its hardly lighting the tubes
and not holding an operating voltage after the initial power on.Screen loses back light after 2 sec thats if it can muster up the initial ump to light the screen.

My dell lcd attatched to the...

Re: Hanns-G HU171D & 171A - Blank (white) screen... both of them.

Ok A few days have passed ,
I have repaired 3 LCDS since and was about to start scraping the caps on the PCB of the HU171D but I thought to give it one more shot

Ive got the screen to work , I was right with going on the acer screen.
I GET A BOX THAT COMFIRMS VIDEO BOARD SEARCHES FOR SIGNAL
then Im getting a ornge flashing light ,
Im going to rebuild it and see what its doing in a min

NOT A VIDEO BOARD PROBLEM
MAYBE A POWER ISSUE I STILL HEAR...

Re: Broken Dell 1800FP Power Supply - when and when not to resolder?

Wanted to do a follow up I Still have the 1800FP running on the molex connector of a power supply.

Actually disconnected mounted power supply and ran an extension to pc runing it off the power supply on the pc it already had the physical vga cable , no sacrifice by being one more string attatched

Allso If you are pulling this off make sure you dont have a very power hungry video card.

DIAGRAMS ON BOARD - get that FAULTY Power supply out and fix it for free
...

Re: Hanns-G HU171D & 171A - Blank (white) screen... both of them.

My theory ,

The power supply goes bad and blows both the video chipset and monitor controller chipset

Every thing I attempted was epic fail , I lost a good monitor in the whole process + screen.

I give up on HANNS G (they make stuff that breaks other stuff )

Stick to power failure and caps and you wont go wrong , do not bother with the white screen its hellish for this series of monitor.

This is the first of 7 monitors I have not repaired...

Re: Hanns-G HU171D & 171A - Blank (white) screen... both of them.

Im Looking into this white screens problem.

I have notice a High pitch FQ around the inverter half of the power board.

I have about 15 black lines at start then solid white LCD.

I have an acer with the same LCD screen connections , IM GOING TO CHECK SCREEN. I have an idea that the screens intergrated board is faulty.
Will post this weekend hopefully.

I allso have allot of compatible video boards / Power boards
I need the 8-Pin Diagram...

Re: Broken Dell 1800FP Power Supply - when and when not to resolder?

The dell 1800FP , allot of faulty PB! The fix is simple.
After removing your faulty power board flip it upside down,under there you will see the diagram for the 8 wires (2) Gounds) pair them (2) 12.volts)pair them (2) more Grounds)pair them and (2) 5.volts) pair them.

lucky for you these 8 wires make 4 pairs LOL

Take the 4 wires in the right order plug them into a molex connector(computer power supply)you could use your pcs power supply if you have 50 watts to spare just extend...