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Equipment Repairs => LCD TV forum => Topic started by: kingchristo on April 12, 2011,09:02:33

Title: Samsung 26inch Le26r74bd wont turn on HELP
Post by: kingchristo on April 12, 2011,09:02:33

This tv just stays on the standby light and doesnt turn on does anyone know what may be the problem with this thanks
chris

Title: Re: Samsung 26inch Le26r74bd wont turn on HELP
Post by: buncey on April 12, 2011,09:58:15

check psu for bulged or high esr caps. also check fets for shorts and surrounding diodes which might be open.

Title: Re: Samsung 26inch Le26r74bd wont turn on HELP
Post by: sparky on April 12, 2011,11:01:09

hi
you could have a fault on mother board micro ic
dave

Title: Re: Samsung 26inch Le26r74bd wont turn on HELP
Post by: TellyFun on April 12, 2011,20:16:57

If it stays in standby and no attempt for it to power up then i reckon the 5v is unstable,i had this a bit back check cs802 22uf ,if yoiu measure it the 5v olts is all over the place.

Title: Re: Samsung 26inch Le26r74bd wont turn on HELP
Post by: kingchristo on April 13, 2011,05:56:52

Ill have a look at the caps if these are all ok and the 5v is at fault what is the best fix for this will it mean a new board thanks for the replys

Title: Re: Samsung 26inch Le26r74bd wont turn on HELP
Post by: kingchristo on April 13, 2011,06:15:59

What is the cs802 and where should i look for this how do i fix this problem if the 5v it bad thanks
chris

Title: Re: Samsung 26inch Le26r74bd wont turn on HELP
Post by: jimca007 on April 20, 2011,09:05:22

you'll prob find a few bad capacitors on the output mate just look for leaking and/or that nice domed effect on the top of the cap, they should look perectly flat in the main so if the're not their likely knackered. Just replace the faulty caps and with a bit of luck the rest of the psu will be fine

Title: Re: Samsung 26inch Le26r74bd wont turn on HELP
Post by: kennyc on April 28, 2011,09:04:16

hi there . had a similar fault .it was a dry joint on i think it was q8802.power supply bottom right just above the mains input you will see it. it has no heat sink on it . it gives the same fault as the 40" tv without the clicking