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About Jestine Yong
My name is Jestine Yong and I love Electronics Repair. That's the reason why I created my own blog at JestineYong.com. With over 3700 posts and nearly years worth of content, walking you through the ups and downs, and in and outs of electronics repairing and how others are making income in electronics repair. On this blog, you'll find my Electronic Repair experiences, tips, tricks, guide & recommendations. I've also written 5 repair ebooks that you can check it out at the right side of this blog. Feel free to browse around the blog and absorb as much electronics repair information as you could. Thanks for visiting!
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FEJI
September 25, 2012 at 7:33 am
what about the LCD sir thats my problem now ill still troubleshot this sony LCD 32 inch
Jestine Yong
September 25, 2012 at 8:25 pm
Hi Feji,
If it is a LCD TV then the problem could be bad LCD Panel or T-CON board. Before that make sure all the output voltages from the power supply and from the voltage regulator ICs are good and stable. Make sure also the LVDS cable is properly seated. Try call out the OSD menu to see if it blur or not.
Jestine
louie
September 28, 2012 at 2:32 am
sr,may i know what is the replcement of tl431
Jestine Yong
September 28, 2012 at 7:35 am
Hi Louie,
No replacement for TL431. This part is easily be found in any electronics shop.
Jestine
FEJI
September 28, 2012 at 8:06 am
ok thanks..more power god bless
feji
Bibhas Saha
October 8, 2012 at 7:52 am
Sir,
I like lcd monitor repairing.I leave in India. How i can this lcd monitor repairing training . I did not fluently speak to english.Sir apka kohi training center hai india mai.(this langugae in hindi)
Jestine Yong
October 8, 2012 at 8:25 pm
Hi BIBHAS,
For more information please visit http://www.noahtechelectronicstraining.com
Jestine
GERMAN
October 8, 2012 at 8:04 pm
HI JESTINE I BOUGTH YOUR EBOOK 10 TRUE REPAIR CASE HISTORIES OF LCD MONITORS VOLUME 1, IT IS EXCELLENT !!!! CONGRATULATIONS!!!. I ASK ABOUT OUTPUT OF ANALOGUE MULTIMETER,THANK YOU. I WAIT FOR VOLUME 2
Jestine Yong
October 8, 2012 at 8:26 pm
Hi Germani,
Thanks for the support and glad that you liked the ebook. I’m still preparing the volume 2. What do you need to know about the analogue multimeter?
Jestine
FEJI
October 13, 2012 at 5:56 am
sir me i ask again about my lcd samsung the problem was the light indicator is blinking and i found one blown capacitor 470/25v, i replaced new one but still it's blinking.
please advice….. god bless
Jestine Yong
October 13, 2012 at 8:42 am
Hi Feji,
Is the output voltages good and stable? If stable then the problem could be from mainboard. If not stable then you may need to check on the components in the power supply side. You also need to know that a shorted component in the inverter board also could cause the power to blink.
Jestine
FEJI
October 13, 2012 at 6:26 pm
does the 24v det. has an automatic voltage, i checked from 24v det but only 6v is the available voltage, but the other 24v connection is stable
Jestine Yong
October 15, 2012 at 9:09 pm
Hi Feji,
I’m referring to all the output voltages. Ok what about voltages that go into the ICs in the mainboard? Are they stable and fluctuate?
Jestine
FEJI
October 17, 2012 at 8:01 am
all stable sir .. thanks a lot
god bless more power
Jestine Yong
October 17, 2012 at 7:57 pm
Hi Feji,
What was the solution?
Jestine
christopher
October 21, 2012 at 6:56 am
Hi Jestine,
I always enjoy seeing your latest troubleshooting techniques. On my own i have loved electronics so much authogh i did an electrical course. Jestine i would like to know more about repair works on electronic appliances like DVD, TV etc. The first one should be the TV, because i do try repairing. I would like to have clear explanation and block understanding how the power flows and what components does all sound and picture issues, how the signal is interpretend on the board to give out a lot of things.
Jestine Yong
October 21, 2012 at 9:37 am
Hi Christopher,
Usually this kind of information can be found in the service manual. Try visit eserviceinfo.com to download some of the LCD TV service manual (not schematic diagram).
Jestine
FEJI
October 24, 2012 at 8:43 am
i found loose connection from power supply board going to main board and thanks again for help.. god bless
aria
November 3, 2012 at 4:20 am
good blog jestine thanks
prosper komba
November 7, 2012 at 7:26 am
Hi! my question is how capacitor and diode works when are paralled together i ve' seen this from certain
switch mode power supply .sorry i'm student
Jestine Yong
November 7, 2012 at 11:14 pm
Hi Prosper,
Could you show to me a photo and a link as I can’t give any answer just base on two components connection.
Jestine
Mtessa
November 14, 2012 at 7:05 am
firstly, i have to thank justine for this blog. secondly, for prosper what i know is this a diode work as a rectrifier and a capacitor (mostly celamic) work as smoothening device, so connecting of diode and capacitor in parellel is used a rectrifier with reduced noise.
Jestine Yong
November 14, 2012 at 8:45 pm
Hi Mtessa,
For removing the ripple you need an electrolytic capacitor and yes it is connected in parallel.
jestine
Sunilkumar KS
November 17, 2012 at 7:40 am
Sir, My remote control switch of brand OUILA (4 way remote) is not working. How to repair this?
Jestine Yong
November 19, 2012 at 10:06 pm
Hi Sunilkumar,
Make sure the battery are good and no broken circuit track in the remote circuit board. If all found to be good then it could be the main ic fault and it can’t be repaired.
Jestine
MIKE
November 24, 2012 at 9:05 pm
hello mr Yong.
i know how to troubleshoot a board with a schematics.Sometime , i received boards with no schematics and full of smd components. tracing them is very difficult specialially when the board is multilayered. Can you give us some ideas about how to do it. OTHES thing tracing board is a good way to have experiences in electronics. thanksfor everythingmr YONG.
Jestine Yong
November 25, 2012 at 7:54 am
Hi Mike,
It would be tough to repair such a board. However if you have two similar boards you can compare it using Huntro Tracker. Otherwise you have to understand each section in the board and start checking the section if you suspect it has problem.
Jestine
chuks
December 29, 2012 at 2:53 pm
long time jstine hope ur doing well i lost ur contact but i ve just recoverd it thanks
michael chua
January 17, 2013 at 10:40 am
Hi Jestine,
Do you offer seminars or short courses on electronics, lcd and laptop repairs?
Jestine Yong
January 18, 2013 at 6:28 am
HI Michael,
I’m offering LCD Monitor course but not laptop. Laptop repair course will be available in few month time. Check out http://www.noahtechelectronicstraining.com
Jestine
Rhett
January 19, 2013 at 6:46 pm
Hey Justine…good day..just want to inquire the list of all troubleshooting trainings you can conduct (short/long courses)…thanks a lot.
Jestine Yong
January 19, 2013 at 9:08 pm
Hi Rhett,
Try visit http://www.noahtechelectronicstraining.com. Please email me if you have other question-thanks.
Jestine
reychie
January 25, 2013 at 12:32 am
pls.help me.i have no any cards to make a buy on line. can you send me a address for a shipment? im here in menze p-1a tibal-og santo tomas,davao del norte philippines. im new in t.v. repairing.thank you.
Jestine Yong
January 25, 2013 at 10:15 am
Hi Reychie,
May I know what is your question?
Jestine
Mubashir
May 2, 2013 at 11:24 pm
Dear Jestine, Good Evening
Sir I have Gateway VX720 Monitor, there is no sign of picture (blank screen) I have checked voltages on big capacitor voltage present there, I also changed HOT (transistor) but result is same. What to do, please help me.
Thanks
Mubashir,
Karachi, Pakistan
Jestine Yong
May 3, 2013 at 10:02 am
Hi Mubashir,
Any dc supply voltaga (B+) to the flyback?
Jestine
leonard williams
May 6, 2013 at 7:37 am
i have a viore 42 inch tv lcd when turn on sound and picture is fine a few minuits after the back light gone out leve the sound I suspect the inverter board which light up the back light do you have any comentmr jestine
Jestine Yong
May 6, 2013 at 3:03 pm
Hi Leonard,
Check for bulged e-caps in power supply. If one of the high voltage transformer or the backlights have problem then it will develop that kind of symptom you have just described.
Jestine
Mubashir
May 6, 2013 at 6:42 pm
Dear Jestine, Good Day
Sir how can I check flyback voltage because I don’t have high voltage probe. Is there any other method to check ?
Thanks
Mubashir,
Karachi, Pakistan
Jestine Yong
May 6, 2013 at 8:52 pm
HI Mubashir,
This is the only way to test it because other meters can’t test such a high voltage.
Jestine