Question about Hitachi 42PMA400 42 in. Plasma Television

Open Question

Hitachi 42pma400a this plasma tv has new powersupply but still wont switch on it tring to switch on and start doing hicupps the cooling fan also reduce its speed with hicupps very rare it does switch on if i switch this tv off it will switch on again but if i leave it off for a while 4-5 hours it wont switch on again it start doing hicopps only pl advice

Posted by on

Ad

5 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Anonymous

  • 1 Answer

SOURCE: Sound Problems with Hitachi 42HDS69

ultravision picture dark no sound

Posted on Aug 19, 2009

Ad
sethdileswar

Dileswar Seth

  • 253 Answers

SOURCE: Hitachi 42PD7200 Plasma TV gone dead

this problem is from smps power supply of your tv circuit, may be power capacitor may be short , power transister may be short pls check some spair of power supply

Posted on Apr 06, 2010

TV TD

  • 1 Answer

SOURCE: Problem with Hitachi P50H401 Plasma TV - Will not

I have the same model, P50H401 and it developed the same problem two days ago. This set is 2 1/2 years old in service, being purchased in December 2007. The original manufacture date was October 2007.

The set was turned on and operating at the time and then promptly shut down by itself. The front blue LED power indicator began flashing four times in a loop or cycle.

The flashing LED sequence in this instance points to a problem with one of the following boards: PSU, X-Sus, Y-Sus or SDRs (there are two SDR boards, SDR-U and SDR-D, both are connected off of the Y-Sus board on the left hand side of the frame when rear facing). The set shuts down to prevent further damage to other boards or components.

I could power cycle the set but it would shut down after after a few seconds. Power LED would stay solid, I could hear the PS relays switching, and audio would output through the speakers. Then as the screen was just about to illuminate, the entire set would just shutdown. The blue LED would again go into the 4X flashing sequence.

I could not visually detect any signs of severe component damage on the main PS board. The two large electrolytic capacitors which have been mentioned as problematic in other threads seems fine. The where slightly raised on the top surface, but not blistered or completely blown open.

The only indication of component damage that I could detect visually was on one of the small surface mounted ICs on the SDR-U board.

Through reading other posts on this site, I learned that I was able to remove the suspect SDR-U board and then re-power the set. Doing this proved that the PS, X and Y Sus, and the SDR-D boards where o.k. The PS held, and the lower half of the screen illuminated. (I would only do this for as brief a period as required to determine if the the other boards would function and the screen would illuminate. Do not pro-long operation in this state so as to not cause further damage.)

It was somewhat difficult to locate the correct SDR-U board. My local service rep did not have one in stock, and the Canadian parts distributor was also out of stock. They estimated 10 - 14 business days to order one up from the U.S.A. (Hitachi closed their consumer electronics division in Canada back in 2009.)

By chance, I checked with another service rep in an adjacent town. He had a board for the P55. We did a visual comparison on the two boards and determined that it would be compatable.

The easy part was removing the defective SDR-U board and installing the replacement. The hard part was re-alinging the three ribbon tabs into the respective connectors on the SDR board. Be careful with these ribbons. The other end of each is fused to the plasma panel screen, so if you damage them, your screen is rendered useless.

I initially had the same problems as others have posted with having black or gray lines on the screen when the SDR-U was replaced. After gently adjusting the position of the ribbons as they are seated in the connectors, the lines disappeared. This was a slow and frustrating procedure, but it worked, Be patient.






Posted on Jul 03, 2010

DrewPalmer04

Andrew P.

  • 325 Answers

SOURCE: 7 year old plasma screen 42PMA400A picture

You need to replace your horitzontal buffer boards...they are located on the right side of your tv and there will be two of these. They buffer the signal and cause a problem just like yours.


Best of luck!! thank you!

Posted on Jun 14, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Engine cold. Start engine reading says engine hot ac off. Fans run all time.


Are the fans running on low or high ?
Circuit/System Description
The engine control module (ECM) commands the fans ON in either high speed or low speed, depending on cooling requirements. In low speed, both fans are turned ON at a reduced speed. High speed has both fans turned ON at full speed.
In low speed operation, the ECM applies ground to the coil side of the fan low relay. This energizes the coil and applies voltage directly to the left cooling fan through the switch side of the fan low relay, which is fed by the fan 1 fuse. The right fan is connected in series to the left fan through the de-energized fan control relay so that both operate at low speed.
In high speed operation, the ECM applies a ground to the coil side of the fan low relay, the fan control relay , and the fan high relay. On the fan high relay, the energized coil closes the switch side of the relay and applies voltage directly to the right cooling fan through the switch side of the relay, which is fed by the fan 2 fuse. At the same time, the ECM energizes fan control relay pulling the switch side over, providing a direct path to ground for the left cooling fan, which has voltage applied through the energized fan low relay. In high speed mode, the fans are operated as a parallel circuit with full voltage applied to each.
You should have it hooked up to a scan tool that can read engine sensor data parameters . Check for DTC'S - diagnostic trouble codes etc...
Circuit/System Verification
  1. If DTCs P0480 or P0481 are set, perform those diagnostics first.
  2. Ignition ON, verify with a scan tool that the control module is not commanding fan activation.
  3. Ignition ON, observe that the fans are not activated.
Your best bet is to take it to a ASE certified repair shop !

Jan 10, 2016 | 2009 Chevrolet Silverado 1500

1 Answer

Fan not self starting


you need a new capacitor. look for wires going from fan to a silver item with wires on top. it must be the same size as old one.

Jan 25, 2014 | Heating & Cooling

1 Answer

Samsung plasma TV cooling fan didn't turn on and the TV overheated. Tried replacing with a new fan, but that fan will not turn on either. TV works just fine with back cover removed and a 12" desk fan...


the is a fuse on the board if you follow the power line on the board back to the main power board you will find it. also test the volts with a meter just make sure you have volts. some of these models also have a thermal switch that then the tv hit a surtan temp the fan kicks in.

Sep 17, 2013 | Hitachi 42 in. Plasma TV

2 Answers

TV is powering up then immediately down


Set is in Shutdown as something is wrong.

A wide variety of things cause this--like saying my car will not start.

What it comes down to is someone opens it up doing then some basic voltage checks and makes an educated guess and begins buying and replacing boards.

I work in a shop doing warranty work for Panasonic--they supply all boards for all models made in last 2-3 years and I have seen cases where every board in a set had to be replaced to either find the problem or know the front panel (Plasma Display Panel) was bad.

If do it yourself be prepared to buy one or more boards and install them to "see" which is bad.

Let me know if you have questions

Mar 13, 2012 | Nakamichi VU50P 50 in. HD-Ready Plasma...

1 Answer

T.v. does not work after getting hot and then when cooling down she will start again


Open the back cover & check if any of the fans used for cooling are running at low speed. Some IC's , transistors are provided with heatsinks to cool down & in between them a thermally conductive silicon paste is used to reduce the gap. If the paste has dried the related semicoductor will heat up & the TV will not work. So use a new paste for the heatsinks. Such problems are generally temperature related.

Aug 09, 2011 | Televison & Video

1 Answer

Can a cooling fan be fiited to my 50inch philips plasma tv


yes to your ? i asume you have had the back off of this tv...there are 6-7 modules inside. the power supply is where you need to focus some attention. and yes plasma sets do overheat.try to find a way to attach 2 120mm fans to the heatsinks. then try to find a 12 volt source with a volt meter. attach the fans to that source and you are good to go. be carefull not to short or overload the power supply. or you will be spending 3-4 hundo for a new 1... good luck..

Nov 23, 2009 | Cars & Trucks

1 Answer

I have a humming noise coming from my new 50in panasonic plasma tv. Is this a common problem and if so what could I do about it? Thank you for your time. Pat


The humming noise should be verry low . It is caused by the powersupply and switching fets on the boards. A plasma screen always produce some sort of humming noise when listen carefully to the device but it shouln't be anoying when enyoing a movie. So it is a natural thing but again it should not be noticable, enyoing a movie at apr. 3 meters or so...

Jul 09, 2009 | Panasonic Viera TH-50PZ80U Plasma TV

1 Answer

A/c inside fan motor


You have a single speed motor and attempting to reduce the speed by lowering the voltage will shorten its life considerably. The best way would be to locate a multispeed motor and get a switch to select the speeds. Not a economical means of accomplishing your desired result. Cooling the air beyond the condensation point would produce ice and lower the capacity to dehumidify.
eric

Jul 01, 2009 | Heating & Cooling

1 Answer

Wall mount for 52in tv ?


Here is a mount rated for your size TV http://www.bhphotovideo.com/c/product/518312-REG/Bentley_PLAW_6000FB_PLAW_6000FB_32_60_Flat_Panel.html

Also, be VERY careful mounting ANY plasma above a fireplace. Plasma sets are typically convection cooled to avoid the noise of fans. The heat from a fireplace will GREATLY reduce the life of the set. When people I know insist on putting a set above a fireplace I usually insist they install a cooling fan with ducting that will vent fresh air to the set. If you are concerned about the temp of your set simply consult the owners manual for operating temperature and measure the air above the fireplace yourself. BHphotovideo.com typically has good prices on mounts along with amazon. most other places like bestbuy or circuitcity will stick you on the price of the mount because they make their money from accessories. Also, why did your last set die? plasmas are typically rateed for 10+ years, did yours over heat and start to change colors?

May 17, 2008 | Televison & Video

1 Answer

My plasma tv switching off byself


Sounds to me like your internal cooling fans are not working. Try placing a fan behind your tv and seeing if it stays on longer. If it does then you'll know it's a problem with these fans. Not expensive to fix but not easy to do either.

Apr 10, 2008 | Televison & Video

Not finding what you are looking for?
Hitachi 42PMA400 42 in. Plasma Television Logo

Related Topics:

336 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76204 Answers

matt martin
matt martin

Level 3 Expert

1257 Answers

Todd Hill
Todd Hill

Level 2 Expert

433 Answers

Are you a Hitachi Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...