About Henry A. McKelvey Expertise I have worked in the Electronics field for 25 years, and have been a Telecommunications Expert for 20 years. My Expertise has been in: Video, Audio, RF, Television, and Stereo. I have been in the Television repair business for 25 years and have repaired over 20,000 Televisions in that time. I was a manager of an Information Technology Training Team at The Verizon Advanced Services Group Center, and a Distinguished Member of Technical Staff at Verizon Laboratories. I am now working full time in the TV repair industry until I can find another full time job, I know what your question is: "why don't you just work full time in the TV repair industry permanently?" Well the answer to that is simple, due to the complexity and the DIY craze, TV repair work is at best a good way to make extra money, not to rely on it for your livelihood. A sad truth, but a truth nonetheless.
Experience 25 years as an Electronics Repair Technician, 20 years as a Telecommunications Expert, and I love Electronics.
Organizations The Society of Broadcast Engineers (SBE)
The International Society of Certified Electronics Technicians (ISCET)
Publications On-Line: http://www.fixya.com/users/shuttle83 (solutions to repair issues)
US Patent and Trade Office: (Copy and paste the link below)
http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=McKelvey&FIELD1=&co1=AND&TERM2=Verizon&FIELD2=&d=PG01
Education/Credentials University of Phoenix (MSCIS working on)
University of Phoenix (BSIT 2006)
World College CIE (BTEE 2006)
Cleveland Institute of Technology (ASEE 2006)
National Education Center (Diploma in Commputer and Network Technology 1989)
TESST Electronics School (Diploma in Electronics Engineering Technology 1985)
AG Bell Vocational High School (Diploma in Electronics Repair (Radio and Television Repair 1983)
Awards and Honors Society of Broadcast Engineers Membership (July 2006)
Special Technology Achievement & Recognition Award (STAR Award) August 2004 (ISO 9000 Certification VTO-SIT)
CWNP Certified Wireless Network Administrator (June 2004)
Special Technology Achievement & Recognition Award (STAR Award) September 2003 (MSN Project)
Special Technology Achievement & Recognition Award (STAR Award) November 2003 (Client CD and Registration Server Issue)
Network Management Certification (ICCP)(2002)
Data Communications Engineer Certification (Global Knowledge)(2002)
TCP/IP Network Analyst Certification (ICCP) (2002)
Winners Circle Award for Development of the DNOC Provisional training Team (2001)
FCC License General Radiotelephone without endorsement (1985)
FCC License General Radiotelephone with shipboard RADAR endorsement (1985)
Certified Electronics Technician Certificate (Electronic Communications)(1989)
Certified Electronics Technician Certificate (Consumer Electronics)(1985)
6 Patent Applications on file (do google search on "Henry A. McKelvey")
Past/Present Clients See http://www.fixya.com/users/shuttle83
http://www.google.com/search?hl=en&rlz=1T4DMUS_enUS243US243&q=%22Henry+A.+McKelvey%22+TV+Repair&aq=f&oq=&aqi=
Question QUESTION: TV shuts off intermittently and will not respond to remote or buttons on tv. Power light comes back on, and the tv will show the last channel window but otherwise black screen. It requires unplugging for several minutes to reset, then works ok until it happens again, maybe a day, or week or month later. No storms or malfunctions of other electrical items in house.
ANSWER: Hello Randall,
This problem might be due to a power supply issue. Capacitors drying up and malfunctioning often cause symptoms like this. This requires that the bad capacitors be removed, and good capacitors be installed. I would suggest that you have a qualified TV technician examine and repair your TV. I say this because this will prevent further damage by the possibility of a mistake by someone who is not trained in TV repair.
QUESTION: Thanks for the reply.
This tv is 6 months old. Do you still think capacitor is the issue?
Also, since it can work for a month without symptoms, will service be able to dx the problem if it is not actively malfunctioning?
Lastly, one sevice center said that since I have to unplug to reset, it is called "board lockup" and this means a bad board. They said power issues don't usually cause non-resonse of the controls, but rather repeated shut-offs and functional controls. Do you think this is a possible solution, and, again, can this be tested if not actively malfunctioning?
Answer Hello Randall,
In answer to your questions:
Q) This TV is 6 months old. Do you still think capacitor is the issue?
A) Yes I still believe it's a capacitor issue.
Q) since it can work for a month without symptoms, will service be able to dx the problem if it is not actively malfunctioning?
A) Yes, because they will try to trigger the problem using heating and cooling methods to create stress on the system.
Q) one service center said that since I have to unplug to reset, it is called "board lockup" and this means a bad board. They said power issues don't usually cause non-response of the controls, but rather repeated shut-offs and functional controls. Do you think this is a possible solution, and, again, can this be tested if not actively malfunctioning?
A) The problem I have with this answer from the other service center is that it technically is not true, and here's why: "Board Lockup" implies that the board itself is the problem, which is impossible, the components on the board are the issue, and a spike and or level abnormality in the power supply can cause a solid state component to go into a latched condition where power cycling becomes necessary.
In addition power supply problems by creating fluctuating voltages can create instabilities that can confuse solid state components and cause locking or latching within the circuit, so on these grounds I include the power supply in my scope of testing.
even their own words back my statements" "rather repeated shut-offs and functional controls" This would imply mechanical failure which is a possibility and should be explored however since the power supply has been know to cause these problems in other sets, it to is worth looking at.
Now if the problem is not happening the issue becomes can the problem be triggered? if it is then it's a simple case of finding the trigger and causing the problem and then fixing it.
