Re: Philips 220CW9 no image, power LED cycles toghether with a high pitch whine
Turns out that, against all appearances, it was a capacitor. Ended up replacing them all so that i wouldn't have to go through disassembly again.
sequille
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Last Activity: 12-28-2017, 01:22 PM
Joined: 02-25-2010
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Philips 220CW9 no image, power LED cycles toghether with a high pitch whine
I disconnected the LCD panel, left only the logic board and backlight connected and it stays on (white screen). The moment I connect the LCD panel it starts cycling on-off, together with a (not very loud) squeal that stops when the LED off.
The LCD panel is a Samsung LTM220M1-L01, if this is relevant. -
Re: Acer AL1916 pink tint
Just a smd resistor and capacitor on the green input line, both ok.
Attached a picture of that universal controller. Don't hold your breath though, delivery time is 15-30 business days
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Re: Acer AL1916 pink tint
Universal LCD controller board from China it is then $7 delivered with all the cables included, jumpers to set resolution.
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Re: Acer AL1916 pink tint
Updated the country and mains voltage info.
Checked the buttons board and cable, continuity test OK. Unplugging + replugging while holding power didn't help. The panel is white with the lvds cable removed. I fear it's the eeprom. Do people usually re-flash the eeprom or is it unheard of/rare?Leave a comment:
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Re: Acer AL1916 pink tint
The cable works OK with another monitor, re-soldered the VGA connector. No change and the "menu" key still does nothing.Leave a comment:
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Acer AL1916 pink tint
The "acer" and "no signal" screens don't seem to exhibit this behavior. The moment I plug in the VGA cable the PC image gets displayed with a strong pink tint. The "menu" and "<" ">" keys do noting. "Auto brightens up the screen and does some positioning, but it's still pink, only less so; at the end of the adjustment it goes back to its initial pink hue state. The "power" button also works OK. It's not the lamps, the pink is much more intense, more red and uniform. I suspected the logic board, no bulging capacitors there.... -
Re: TDK XAD341LR EA02341X E168066 Inverter pinout?
I figured it out, it was: GND, DIM, ENA, VCC, VCC. GND was yellow, if you can believe this...Leave a comment:
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Re: TDK XAD341LR EA02341X E168066 Inverter pinout?
I have the pinout for the chinese one, it's printed on the PCB. No info on the original TDK one, nothing printed on the logic board either. I thought someone would be able to figure it out from the voltages....Leave a comment:
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TDK XAD341LR EA02341X E168066 Inverter pinout?
I need to replace it with a generic Chinese one for which i need the enable and dim control pins.
Assuming Black is GND and Red is VCC. Power out of the logic board, without the broken inverter connected:
[CODE]
Function Color Signal cable No signal cable
VCC Red 11.97 7.15
??? Brown 11.97 7.15
??? Green 0.07 -4.78
GND Black
??? Yellow -0.04 -4.90
[/CODE]Code:I need to replace it with a generic Chinese one for which i need the enable and dim control pins. Assuming Black is GND and Red is VCC. Power out of
Last edited by sequille; 11-10-2014, 07:20 AM. -
Re: Samsung LE32A336J1D backlight won't turn on
Wow, thank you! It's so good to know that it's a known issue. The smallest one i could find was 1.25A 250V. The seller seemed confident it's OK to use. Should i go ahead and put it in or try to find another one?Last edited by sequille; 11-09-2014, 03:47 AM.Leave a comment:
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Re: Samsung LE32A336J1D backlight won't turn on
I checked the fuses, they are OK. Until i can get some pictures of it (3Mp camera that i have won't do it) here's a list of the chips on the board:
12 * 4614
10393
BA2902F
OZ964GN
The board is CMO T87I029.14
Since there is no visually identifiable damage, maybe a picture of the product from an online store would help.
I found a burnt fuse, F1, 0.75A 76V. Shops are closed for the day but in the meantime, what could have cause it to burn? If I replace it will...Leave a comment:
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Re: Samsung SyncMaster 710v
Oh, really sorry, I posted this in the TV forum. Could a moderator move it to the computer displays forum?Leave a comment:
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Samsung LE32A336J1D backlight won't turn on
It doesn't flash on and then off, the CFLs simply don't turn on at all. I tested them individually with a one lamp inverter, they all turn on, but only 2/3 of the length (maybe not strong enough inverter?). When they do, I see the image too.
I measured the voltages going into the inverter board:
E_PWM = 3.80
I_PWM = 2.47
BLON = 5.21
VBL = 24.1
What other tests should I run at this point? -
Samsung SyncMaster 710v
I know it has been discussed on this forum and around the net, but this is not the same situation. It's more like the next phase in this monitor's demise, as follows:
It started out as "Not optimum mode" for which i applied the 50/47 ohm fix present around the web (shorting pins 5 and 6 on the Novatek chip with a resistor). It worked for around a year.
Now I'm getting the following behavior:
- turning it on: blank screen, green power led blinks slowly
- removing the vga cable: i get the "check signal cable" box moving around the screen... -
Re: Samsung LE26B350 (F1W) white third of the screen, the rest has the colors off.
I opened it up, it seems there was a leak in the lower left corner of the T-con board. It was indeed at the bottom of the panel. Some ICs had corroded pins, cleaned that up with some isopropyl alcohol. Had to rebuild one of the pins as i was getting a fully white screen after the initial cleaning. The show stopper was that some very thin traces that lead to the ribbon were also corroded. There is a 2 mm portion of PCB right before the ribbon that is not coated in lacquer. That's where the traces got...Leave a comment:
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Re: Samsung LE26B350 (F1W) white third of the screen, the rest has the colors off.
The left side is always white. Attached a photo with the OSD showing too. I will need to get a way better camera than what i have to post usable pictures of the board though...
I will do it in the next couple of days but any preliminary piece of information would be greatly appreciated....Last edited by sequille; 10-22-2014, 01:55 PM.Leave a comment:
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Samsung LE26B350 (F1W) white third of the screen, the rest has the colors off.
I will include some pictures, what i would need is pointing in the right direction (some keywords to further search for). Don't wanna make you guys do all the work
The OSD menu is also very faded out. Sometimes it remains on screen for a while, as if it were a burn-in problem. Sorry that i don't have any pictures of that, i will get some if necessary.... -
Re: NovaTek EasyWriter
yes, this is what i'm planning, but i can only find empty ones, i need to find a way to program it too, and i have absolutely no experience on the matter. elsewhere on this forum a person said that all i need is a LPT > VGA cable and after some reading it seems it means the chip supports In-Sytem Programming but i need a confirmation. Also, that cable is not easy to find so i was thinking since most of the pins are reserved maybe i just need to connect two or three wires, like pin 12 on the vga and some ground, but to what pins on the parallel ...Leave a comment:
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Re: NovaTek EasyWriter
i know this is ancient, but i have the same problem, the 47ohm bridging worked for like a year, now thinking of changing the chip. so, bump!Leave a comment:
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