FS:  FREE -  Hitachi 42PD500 42 inch Flat Screen Television  - Page 1
Forum section: electronics / general

author: Polybus
author_rank: Contributor
timestamp: May 31, 2018, 02:55:46 am
content: Howdy,Anyone in Sydney want a FREE Hitachi 42PD500 42 inch Plasma Television.I've never tried to fire up this little puppy - but I got it in a dumpster dive, so assume its not working. But might be a good project for someone looking to learn how to investigate/diagnose/repair power supplies (I have no idea if the power is the problem or not)Having said that - it looks in reasonable condition - will be great for parts - or perhaps have a go at the caps in the power supply and try to get it going. Looks like someone has already had the back off - no idea what they did inside - but it looks complete to me - but who knows what you'll find if/when you open it up.The screen itself looks OK - no cracks that I can see.Anyway - its FREE, so its the right price.Just come and pick it up and its yours - Baulkham Hills, Sydney.Polybus

author: Mr. Scram
author_rank: Super Contributor
timestamp: May 31, 2018, 03:54:04 am
content: I'll put in an offer of $-20. Free is just too expensive.

author: Polybus
author_rank: Contributor
timestamp: May 31, 2018, 04:15:09 am
content: Come on mate..... -$20 ??!!?!?!It cost me more than thatPolybus

author: stevelup
author_rank: Regular Contributor
timestamp: June 01, 2018, 09:27:17 am
content: I'd pop it back in the next dumpster that you're passing...

author: Acecool
author_rank: Regular Contributor
timestamp: June 04, 2018, 10:22:27 am
content: I'd recommend powering it up...If there is picture but lines down the screen - the repair on that can be very challenging. Typically it's due to the plastic ultra-thin ribbon wires degrading or becoming disconnected. It can also be because of an issue with the board they're connected to - sometimes these boards are cheap, but most of the time it isn't worth it. If the boards are connected via ribbon cables which can be disconnected and reattached then you can usually find replacements and the repair is much easier...If there is a flash before nothing ( or no flash ) and you can see an image using a flashlight next to the screen, then it is a backlight issue caused by insufficient power, broken backlight tubes, leds, etc... These are straight-forward to repair...If you can't get power, or it doesn't turn on to get a flash, etc.. then it is likely the power supply and this is straight-forward in most cases too.. Some tvs use relays which can stick or stop working properly, if you hear clicking when you press the power button and sometimes it works, and sometimes it doesn't then this is the most likely issue - you can open the tv up and tab the relays lightly to get it to activate when it sticks to find which one is causing issues, but if there is more than one of the same on the board - it is sometimes worth replacing all of them at the same time depending on how the power travels, typically it is one of the first activated though and the others don't have an issue.It could also be related to caps or other issues with the board.Either way, for someone just starting on TV / Monitor repairs, this could be a fun project depending what's wrong with it...I found a tv locally for $20 which is an LED LG tv, likely burned a few leds out because someone left them at 100% ( even if you can't really tell much difference after 25% or so depending on the leds ) which will be a fun repair and then a gift for my grandma... ( It has hdmi ports so I'm going to get a chromecast or something with it to stream 24/7 German tv and movies )...

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 04, 2018, 11:02:29 am
content: Quote from: Acecool on June 04, 2018, 10:22:27 amInteresting, a plasma with backlight...

author: Brumby
author_rank: Unknown
timestamp: June 05, 2018, 01:33:22 am
content: ... was thinking the same thing.