how do i post pictures here o this psu board??
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School fees paid as everyday is a learning curve.
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Re: lcd psu problem
https://www.badcaps.net/forum/showthread.php?t=1868Originally posted by battlecat
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Re: lcd psu problem
ive got a lamp driver problem on presario monitor one of ic's have poped and cant find it any where only marking it have is .....CD7K27...wich sound like this 8 pin ic was made for this monitor .....went to the Huipu electronics(shenzen) co ltd website but no help there
If can figure out how to post pics of this board ill attach themAttached FilesSchool fees paid as everyday is a learning curve.Comment
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Re: lcd psu problem
The first picture was acceptable, the one of the bottom of the board wasn't good enough to show anything.Originally posted by battlecat
A few hints: Take the pictures in a well lit area, and use a tripod or steady your hand when you take the picture.
In this case, I see one obvious problem in the top view. The cap by itself at 10 O'clock has a bulging top. On the bottom of the board the SMPS controller (8 pin IC) and inverter controller (16 pin IC) and inverter drivers (8 pin ICs) are obvious by location, but I can't see enough detail to see which has 'poped'.
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: lcd psu problem
Hi thanks for replying back i have uploaded a much better picture .
Im aware of the cap hence the reason i think the ic popped..... so that i can sort out. The main problem is i can't find the part for the inverter bit for the cfl's
you will see the one that popped and one is still ok the top bit off the number is the same 4605 and the other number is cd7k27 . but no data sheet provider turn anything up on these part numbers.
And if i can find out exactly how this ic operates i could build a generic of some sort.Attached FilesSchool fees paid as everyday is a learning curve.Comment
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Re: lcd psu problem
Are you sure its a 5 and not a 6Originally posted by battlecat
check this out
http://www.alldatasheet.com/datashee...MD/AO4600.htmlComment
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Re: lcd psu problem
And you just don' stop rocking .....now to see if i can get hold of that ic in South Africa
Thanks a stack mate .School fees paid as everyday is a learning curve.Comment
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Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
Normally, I never post repairs this quick after I do them, because… I am usually very slow.
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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Hello, I came here after finding some similar questions asked on other monitors and hope someone here can help me get an ancient Viewsonic VP230mp (23" 4:3 LCD) back to working condition.
First a little background, I have a background in computer and electrical engineering, and I'm smart enough to know I know nothing about LCD displays and how they work. For this topic I'm as green as they come.
When the display is turned on the viewsonic logo displays in the uppper left for 2 seconds then the screen goes black, the power LED is green (on) and when a computer is connected... -
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
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