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

4 Suggested Answers

  • 1 Answer

SOURCE: Sound Problems with Hitachi 42HDS69

ultravision picture dark no sound

Posted on Aug 19, 2009

  • 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

  • 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

  • 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

0 characters

Uploading: 0%


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


1 Points

Related Questions:

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

1 Answer

Have a Hitachi Plasma TV that works but powersupply is overheating.

There should be some sort of short circuit. Contact any experienced service technician. If you are not familiar with electronics, do not attempt to repair. Whether you suffer fatal electrical shock! Instead, contact the nearest service center.

Feb 22, 2013 | Flat Panel Televisions

1 Answer

Hi, we have just bought a second hand Hitachi Hi Plasma TV Model PD1, 42PMA400A. We have a wall bracket but what we'd eally like is a stand ... the base plate and two stems that go into the bottom of...

If you search on Ebay for your TV's exact model number, sometimes you can find a replacement stand for it there from someone who has their TV mounted to the wall and is no longer using it. These are normally fairly heavy and bulky items, so Ebay purchase prices and shipping costs can vary widely.

I did not see any for your exact model of TV available there when I looked, but the online selection changes daily, so you can always keep checking back. Just search on Ebay for 'HITACHI TV STAND' or 'HITACHI TV BASE' and you will see a wide variety of them available for different Hitachi TV models as well as what the average price for them is.
Otherwise you can just buy a generic wall mount floor stand for around $100 which bolts to the TV like a wall mount, but actually sits on the floor instead of being bolted to the wall.

Here are some links to a few different models currently available on Ebay which include pictures so you can see what I mean:

I hope that was helpful to you, good luck and take care.


Aug 30, 2011 | Hitachi Flat Panel Televisions

1 Answer

7 year old plasma screen 42PMA400A picture flickers horizontally

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!

Jun 14, 2011 | Hitachi 42PMA400 42 in. Plasma Television

1 Answer

My Hitachi has two cooling fans, but yet I have never seen them work, and the front of the plasma panel gives off allot of heat, is this normal?

It is not a normal situation, the fans should be worked because these are installed for colling, that is why the tv is producing heat, you should check this from any authorized/qualified technician to avoid future complication.
Hope it helps, if so do rate the solution

Dec 26, 2010 | Hitachi 42HDS69 42 in. Plasma Television

1 Answer

Hitachi 42 inch plasma tv shuts off by it self

This is not really a solution, but read on... I had these symptoms in my 42 inch Hitachi plasma also.When I took it in to get it looked at , I was told that dust was accumulating on and around the cooling fans.He gave it a quick cleaning ( vacuuming I assume) and it worked for a while then started malfunctioning again. Now I'm trying to decide whether to just pitch it or keep cleaning it myself.Hope this helps.

May 31, 2010 | Hitachi 42HDS69 42 in. Plasma Television

1 Answer

T.V. Loses its picture when it gets hot but I can still hear it

Hitachi sets are prone to Power Supply Faults.

I think your PSU is getting too hot, then shutting down.

The better sets have Fans in them.

Either repalce the Power Suplly or put up with the fan.

It will however still fail in the end, one or more components are allready failing under stress / load.


Sep 06, 2009 | Hitachi 50HDT50 50 in. Plasma Television

1 Answer

Hitachi Plasma P50S601 no picture sound OK

probably needs new scan drive board along with upper and lower buffer boards. it wont be cheap and its best to have a tv shop do it.

Aug 30, 2009 | Hitachi Ultravision P50S601 50 in. Plasma...

2 Answers


the cooling fan could be going out

Dec 13, 2008 | Hitachi 50V500 50 in. HD-Ready LCD...

Not finding what you are looking for?

Open Questions:

See all Hitachi 42PMA400 42 in. Plasma Television Questions

Hitachi 42PMA400 42 in. Plasma Television Logo

Related Topics:

302 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Flat Panel Televisions Experts

The Knight
The Knight

Level 3 Expert

66330 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers


Level 2 Expert

223 Answers

Are you a Hitachi Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides