Re: Daytek F19AH
It would appear they are
It would appear they are
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Re: Daytek F19AH
Since the two ceramic caps are out of spec, I would go ahead and add those two to your list. 0.47nf @ 1000 volts.Comment
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Re: Daytek F19AH
I will get some of those caps along with the D444. Both those are readily available on ebay.
(Off topic)
I just cracked open a benq monitor today with no backlight.
There is actually a repair *KIT* available on ebay for this one
http://cgi.ebay.com/REPAIR-KIT-2SC57...item3355ff711b
I also found a complete service manual for the BenQ in less than 5 minutes.
If only this Daytek was that simple lol
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Re: Daytek F19AH
The big problem with the Daytek occurred back in post 46 where we failed to recognize that the output resistance was too low. If we had caught the problem then this thread would have been much shorter.I will get some of those caps along with the D444. Both those are readily available on ebay.
(Off topic)
I just cracked open a benq monitor today with no backlight.
There is actually a repair *KIT* available on ebay for this one
http://cgi.ebay.com/REPAIR-KIT-2SC57...item3355ff711b
I also found a complete service manual for the BenQ in less than 5 minutes.
If only this Daytek was that simple lol
As far as repairing monitors is concerned, the parts kits are the equivalent of the 'paint by number' sets. They are good for getting a working monitor PROVIDED the fault is the common failure, but they sure don't teach you much.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Daytek F19AH
And the result is......Daytek = Fixed....BenQ = Fixed
I am back to dual monitors!!! HUGE improvement over the single IBM C51 lol
BenQ was a walk in the park because there was a previous thread on that monitor that explained the problem as well as a protection circuit. https://www.badcaps.net/forum/showthread.php?t=4304 When I get another LCD I am gonna take the BenQ down and have a stab at the protection circuit.
As for the Daytek, this has been hell and back lol. The 471k caps I ordered, I tested 4 and they all turned out to be 29nf so maybe I got a bad batch IDK but I left the current ones in there, put in the new D444's, lifted 2 solder pads in the process, and got so happy that it worked I forgot to switch out the Radio Shack caps and order Panasonics. Oh well the Daytek is done, it's working and and I'm gonna follow the whole if it ain't broke don't fix it thing for now. If anything happens to the Daytek for forgetting to change those caps I know where to look now.
I usually shut my monitors off at night but my test for them both is I am going to leave them both on for the next 2 days straight.
I have also now ordered that Repair LCD monitors book off the net and it looks like it has some GREAT info in it.
Thank you to everyone who has helped me out with this monitor especially PlainBill and jetadm123. Gonna start flippin' through that book but it's a given I will hit another snag along the way & I'll be back so until then.......Attached FilesComment
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Re: Daytek F19AH
Congratulations!!! It's scant consolation, but the repairs that have you tearing your hair out are the ones that teach you the most.And the result is......Daytek = Fixed....BenQ = Fixed I am back to dual monitors!!! HUGE improvement over the single IBM C51 lol
BenQ was a walk in the park because there was a previous thread on that monitor that explained the problem as well as a protection circuit. https://www.badcaps.net/forum/showthread.php?t=4304 When I get another LCD I am gonna take the BenQ down and have a stab at the protection circuit.
As for the Daytek, this has been hell and back lol. The 471k caps I ordered, I tested 4 and they all turned out to be 29nf so maybe I got a bad batch IDK but I left the current ones in there, put in the new D444's, lifted 2 solder pads in the process, and got so happy that it worked I forgot to switch out the Radio Shack caps and order Panasonics. Oh well the Daytek is done, it's working and and I'm gonna follow the whole if it ain't broke don't fix it thing for now. If anything happens to the Daytek for forgetting to change those caps I know where to look now.
I usually shut my monitors off at night but my test for them both is I am going to leave them both on for the next 2 days straight.
I have also now ordered that Repair LCD monitors book off the net and it looks like it has some GREAT info in it.
Thank you to everyone who has helped me out with this monitor especially PlainBill and jetadm123. Gonna start flippin' through that book but it's a given I will hit another snag along the way & I'll be back so until then.......
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Daytek F19AH
Excellent work! Glad you kept at it! Too bad about the ceramic caps. Also, we now know of at least a substitute mosfet that will work on your board. Keep up the good work.Comment
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Re: Daytek F19AH
Hi guys I'm new in the forum ,but I do have daytek f19dh and come black scrim the green light still on and come yellow when the pc go sleep ,if I push the button on the side on-off the scrim buck on for couple of second and go dark again what could I do to make it work ? I appreciate any answers about that issue thank'sAttached FilesLast edited by osoduro; 05-04-2011, 09:34 PM.Comment
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I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.
I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.
The models launched in 2018 and 2019 respectively.... -
Hi everyone! I'm trying to fix my black screen / failed U8900 GPU v-core on my Mid-2012 Macbook Pro 15" Retinaby doing a rework/reflow of the chip (once I determine that's the real issue; but it likely is).
I've been disabling the GPU in NVRAM for a few years... but it's just time for a better solution.
I'm new to soldering but the only feasible way to fix this issue is to do something myself.
MY QUESTION:
I've been seeing some people (on this forum mostly) run into issues with the logic board needing a serial number or it being deactivated (?)... -
Hi all, I just want to share the repair of my 60PK550-UA TV set.
The TV set was powering on, just no image. After verification, nothing wrong on the YSus or ZSus boards. Nothing wrong on the main board either.
But I noticed that the LED was not flashing on the Logic Control Board. This is an EBR63450301. The LED is supposed to flash even with all the flat cables disconnected, with only the power cable attached.
All the voltages measured at the electrolytic capacitors on the board were good. From top left to bottom right:
C57: 3.30V
C61:...07-20-2023, 12:38 AM -
Hi dear friends., I am working on a Apple MacBook Pro A1708 , Logic Board 820-00840-A that has no backlight. The logic board powers on fine, but no display. After Checking on the backlight driver chip, I found that the EDP_BKL_EN is missing. And this Power Enable comes from the PCH. So does this means this Logic board cannot be repaired & brought back to life again? The resistance from GRD to the test point of EDP_BKL_EN is around is 0.66M ohms. R8442 (0ohms) is ok. Any suggestion/Tip if any would really appreciate. -
Hi good Friends., today working on a Macbook Pro A2289, Logic board 820-01978-A. The history was liquid spill, Cleaned & replaced all corroded components & now the logic board shows 20v & .01amp on the meter. Not taking in any amps. Upon trouble shooting I get the required stable voltages 5V, PP3V3_G3H 3.3V but no PP3V3_S5. Checked the schematic, assume that this is generated from U7800. Checked all the Input/Output voltages on this chip. All is fine, except PP3V3_S5 is missing. Resistance from GND to PP3V3_S5 is 146 Kohms. First I need to make sure whether PP3V3_S5 is generated from...
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