tag:blogger.com,1999:blog-3568171609535289268.post4816421213193063239..comments2023-07-05T04:14:36.021-07:00Comments on Preher-Tech Blog: Samsung HPT4254 (HPT4254X/XAA) BN44-00161A Power Supply Repaired.Preher Serviceshttp://www.blogger.com/profile/14357741130081956449noreply@blogger.comBlogger137125tag:blogger.com,1999:blog-3568171609535289268.post-22099402018047888312020-04-09T10:03:32.200-07:002020-04-09T10:03:32.200-07:00What is the difference between Qx802 mosfet and Dm...What is the difference between Qx802 mosfet and Dm852 mosfetAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-40815988761082157732019-03-17T08:49:34.881-07:002019-03-17T08:49:34.881-07:00If more people that write articles really concerne...If more people that write articles really concerned themselves with writing great content like you, more readers would be interested in their writings. Thank you for caring about your content. <a href="http://www.365powersupply.com/product/g4v10-dell-optiplex-desktop-250w-power-supply/" rel="nofollow">g4v10</a><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-42393894718380214352017-05-14T16:51:26.953-07:002017-05-14T16:51:26.953-07:00FQPF9N50CFQPF9N50CRigo Suavehttps://www.blogger.com/profile/01005322456740968641noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-38342837709484062562016-11-26T08:10:16.761-08:002016-11-26T08:10:16.761-08:00How do I remove a blown mosfet (QX802)? Do I need ...How do I remove a blown mosfet (QX802)? Do I need to melt it with a solder gun? I removed the screw holding it in but it won't come out. Thanks.Anonymoushttps://www.blogger.com/profile/15652590439497434099noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-35764313675511242362016-04-21T06:23:58.030-07:002016-04-21T06:23:58.030-07:00Hello! I found many problems in many electronics b...Hello! I found many problems in many electronics but I never found problem in samsung till now. But your blog makes me aware of such problems how to repair it. Thanks for nice information.Bob Wettermannhttp://www.soldertools.net/categories/PCB-Repair-Materials/noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-60171427056321121462016-04-19T12:08:14.136-07:002016-04-19T12:08:14.136-07:00I've fixed the click of death on mine and a fr...I've fixed the click of death on mine and a friends LCD's...<br />Well...I've run across a different problem. The screen on a friends plasma is "screwy" (technical term).<br />HP-T4264<br />BN44 1A PS.<br />No clicking though.<br />Seems only the right side of the tv lights up. If you leave it on for awhile the pixels "creep". Slowly moving in and out.<br />Any ideas at all?<br />Looks like the CB855 Capacitor is bulging. Other than that, I see nothing irregular.<br />Here's a link to a google image of a similar problem, except the website is defunct. :/<br /><br />http://i.ytimg.com/vi/MSgXrgEt2Mc/0.jpg<br /><br />Thanks.<br />k.pawluk at gmail dot comAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-9331259311522169072016-04-16T06:22:58.229-07:002016-04-16T06:22:58.229-07:00You have good research and writing skills I always...You have good research and writing skills I always read your latest post. We are currently work here <a href="http://www.cellntrade.com/" rel="nofollow"> cell phone repair service in TX<br /></a>.<br />John Noahhttps://www.blogger.com/profile/13633425833391214756noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-66183247278031425892016-03-16T05:13:16.830-07:002016-03-16T05:13:16.830-07:00Your blog is very useful as i am only searching fo...Your blog is very useful as i am only searching for this type of blog only.<br />i have a <b><a href="http://duotechelectronics.co.uk/tv-repair.asp" rel="nofollow">television repair</a></b> company in birmingham. please have a look at my workAnonymoushttps://www.blogger.com/profile/10699231256792497127noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-28286165702167372382016-02-12T03:14:38.651-08:002016-02-12T03:14:38.651-08:00Thanks,Got My Samsung Galaxy s5 Fixed @ Low Cost @...Thanks,Got My Samsung Galaxy s5 Fixed @ Low Cost @ <a href="http://www.samsungrepairing.uk/mobile-phone-repair-plymouth/" rel="nofollow">Mobile Phone Repairs Plymouth</a>Giselle Prestonhttps://www.blogger.com/profile/18291275866188767174noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-78130676848954419872015-11-11T22:21:58.238-08:002015-11-11T22:21:58.238-08:00Chris, could you share a link to your schematics f...Chris, could you share a link to your schematics for us please. Would be of great assistance. Thanks in advanceAnonymoushttps://www.blogger.com/profile/03632062434742377432noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-24204214503939393242015-10-27T13:29:09.225-07:002015-10-27T13:29:09.225-07:00Hello. I have a similar problem on my Samsung ps51...Hello. I have a similar problem on my Samsung ps51e550. Could the mosfets affect this tv aswell. They are k12a50d. Thanks in advance. Anonymoushttps://www.blogger.com/profile/02209252306064678512noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-23193980932326159912015-09-21T11:36:55.224-07:002015-09-21T11:36:55.224-07:00 I have a HP-T4254 and this weekend it just stoppe... I have a HP-T4254 and this weekend it just stopped turning on. It has never clicked or turned off and on like other people have talked about. I guess my night time fun tonight will be taking this thing apart and see what I can find. The little blue light that normally is on around the power button is no longer on either.Anonymoushttps://www.blogger.com/profile/05631022349731870313noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-55646801494337342972015-07-17T13:41:06.295-07:002015-07-17T13:41:06.295-07:00Yes we are. You can email us anytime at contactus@...Yes we are. You can email us anytime at contactus@preher-tech.comPreher Serviceshttps://www.blogger.com/profile/14357741130081956449noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-77401192907575161172015-07-15T14:52:04.104-07:002015-07-15T14:52:04.104-07:00Preher-tech, are you still available for questions...Preher-tech, are you still available for questions on the Samsung HP-T4254?SmittyBilthttps://www.blogger.com/profile/05329614406702991710noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-48405496414698508302015-04-24T11:57:17.016-07:002015-04-24T11:57:17.016-07:00Helping a friend with his HPT4254XAA TV which had ...Helping a friend with his HPT4254XAA TV which had the same power supply problem many here have described. We sent it in to you for repair and when it was installed, the picture came on but there was a different problem. The top half of the screen is a combination of very light superimposed images of the top and bottom halves of the picture while the bottom half of the screen is OK as is the sound. Figured repairing the power supply would fix it since it worked before. The Y buffer board has been replaced but no help. Any ideas or is there a schematic of the power supply that will show the voltage test points? I don't want to just keep replacing boards without a lead. Thanks.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-86678760926496671792015-04-23T17:31:45.228-07:002015-04-23T17:31:45.228-07:00Just thought I'd update on my situation. I re...Just thought I'd update on my situation. I replaced the 4 mosfets and she turned right on. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-53837774682927518142015-04-20T14:26:13.018-07:002015-04-20T14:26:13.018-07:00Just one more question. If QS801, QS802, QX801, Q...Just one more question. If QS801, QS802, QX801, QX802 were bad would they still heat the heat sink?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-91402032104621465792015-04-20T13:49:35.591-07:002015-04-20T13:49:35.591-07:00Sorry wrote that from my cell phoneSorry wrote that from my cell phoneAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-65407386040458337242015-04-20T13:48:11.694-07:002015-04-20T13:48:11.694-07:00Hi guys I've got the 42" plasma. I got it...Hi guys I've got the 42" plasma. I got it for free. When I first plugged it in it turned right on but after 3-5 minutes it shut off. Pulled the back off noticed one of the 1000uf caps was blown. I went ahead and changed both of the 1000 and the 470 out. Put it all back together and it turned right on again. 3-5 minutes later it shut off again. Both times it went to a slow clicking. Read through comments , then checked solder joints on the mosfets. Almost all were broken so I re soldered them. Now the tv won't start and it's clicking fast like 7 or 8 times then a pause and it just keeps repeating. Any ideas? <br /><br />So writing this from my cell phone<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-42903377731659885332015-02-28T15:22:32.245-08:002015-02-28T15:22:32.245-08:00Which IC(chip) did he say was faulty?Which IC(chip) did he say was faulty?Preher Serviceshttps://www.blogger.com/profile/14357741130081956449noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-19105200697335194042015-02-28T15:15:01.923-08:002015-02-28T15:15:01.923-08:00I removed the power board to get number off it. My...I removed the power board to get number off it. My capacitors are fine and was told by my tv repair man that a "chip" was bad..I know of this chip he is speakin(if thatsnthe right terminolgy). He did tell me that it could be replaced but would have to be program, which would still render tv useless..I have to guess that if and when I bought a new board off of you that this process would be complete...my question is A. Is this correct and B. You do obviously program or install a program chip in board? ThanksAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-91623051496650604972014-09-25T07:54:34.173-07:002014-09-25T07:54:34.173-07:00Thank for all those posts...that make my Samsung H...Thank for all those posts...that make my Samsung HP-T4364 plasma tv works again!<br />Mine have the same clicking problem. First I inspect the capacitors on power supply board and just one seems damaged, but I changed all 10 capacitors....with big expectations. But same clicking came again. Then I discover this post and decide to change the 4 mosfet QX 801 and 802 and QS801 and 802....and magic happen...my TV works again! Spend just $40 to fix that! Thank you guys!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-71840306175323166532014-09-11T12:51:23.460-07:002014-09-11T12:51:23.460-07:00I replaced CX816 and CX819 which were two 1000uF 2...I replaced CX816 and CX819 which were two 1000uF 25V CapXcon capacitors bulging and leaking at the top vent. I put in Nichicon VZ series of the same values. Also notice the TV would only stay on when I applied pressure to the main heatsync the FET's are screwed into. As soon as I let go of the heat sync, the TV would turn off and cycle on/off. I resoldered all the FET's along this heat sync and now its been two days of straight operation with no issues. Hopefully the TV lasts for a few more years to come. Yeah only 720p, but the color accuracy is phenomenal for this generation of TV.Anonymoushttps://www.blogger.com/profile/15263090152543312961noreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-61217175586387441052014-08-27T21:29:37.991-07:002014-08-27T21:29:37.991-07:00I recently mailed the power board from my Samsung ...I recently mailed the power board from my Samsung 42 inch TV to you and had a rapid turn around time. Thanks. It was "clicking" as all of those other were doing. Problem is...when I installed the circuit board, the clicking stopped but I did not get any video at all, whereas before I sent the board, I was getting temporary video then blank screen. It comes on great now but even hooked up to Direct TV and trying all of MY known tactics to get the monitor screen to light up, I have not been successful. Any advice?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3568171609535289268.post-46880915696572029782014-08-26T03:56:46.183-07:002014-08-26T03:56:46.183-07:00Hello
I need some help regarding my 5V st by volt...Hello <br />I need some help regarding my 5V st by voltage. I only have 3,2V on st by and I have changed the ICB802 (Viper22A); ICQ805 (KA7815E); QQ802;QQ803, capacitors and diods as well but still 3,2V. I have replaced the TB801 still the same problem. What can I do? <br /><br />Thanks<br />Anonymousnoreply@blogger.com