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Search: Posts Made By: stj
Forum: Troubleshooting Computer Displays Today, 02:03 AM
Replies: 11
Views: 316
Posted By stj
Re: HP ZR2740W troubleshooting

led strips cant fail.
they consist of a number of groups that are strobed in sequence very fast to keep the power level low.
if an led fails you will only lose around 7 leds from the strip.
Forum: Troubleshooting Laptops & Notebooks Today, 01:54 AM
Replies: 1
Views: 22
Posted By stj
Re: Problem in 5V Fan

take the fan out and test it.
they often jam or need to be stripped & lubed.
Forum: Custom Tweaks, Modifications, and Revisions Today, 01:52 AM
Replies: 26
Views: 544
Posted By stj
Re: Modding gone mad/crazy

am i the only one who noticed the idiot spray-painted the case with the side panels fitted.
look at the mess down the right side.

and it looks like there may be a fan in the top ahead of the psu...
Forum: Custom Tweaks, Modifications, and Revisions Today, 01:41 AM
Replies: 10
Views: 418
Posted By stj
Re: MacBook Air 2010 RAM upgrage

run a linux-live disk and see what it says about the ram.
if it see's it in detail then there is an eeprom - because that's how linu gets the ram data.
Forum: Custom Tweaks, Modifications, and Revisions Today, 01:38 AM
Replies: 17
Views: 1,124
Posted By stj
Re: Cramming Heatsinked RAM into an Imac g5

do NOT remove the heatsinks,

i did that to a couple of old dimms and found that they used DIY-ON-BOARD technology under the sink with no chip packages!
Forum: General Computer Discussion Today, 01:30 AM
Replies: 4
Views: 52
Posted By stj
Re: Dell Latitude D820 upgrade

dont you dare pay for it,
they ow you anyway for forcing win8 on you.
try duel-booting win7 & linux-mint
Forum: All Others Motherboards Yesterday, 03:04 PM
Replies: 5
Views: 35
Posted By stj
Re: Advantech PCM-5862 recap & general fixup

good for MEGATOUCH-XL arcade machines,
they use a 486 board with a crap bios and the harddrives must have specific geometry!
Forum: Other Devices with Bad Capacitors Yesterday, 03:02 PM
Replies: 9
Views: 130
Posted By stj
Re: Complete Xbox 360 Recap?? (Polymer)

Fujitsu make - i think they are poly's
Forum: Troubleshooting TVs and Video Sources Yesterday, 12:12 PM
Replies: 16
Views: 102
Posted By stj
Re: Samsung UN46D6003SFXZA screen dark then bright

they are.
scaler chips often get *very* hot and should have a heatsink stuck on them - but often they dont bother to save money! :(
Forum: General Electronics Technical Discussion Yesterday, 12:08 PM
Replies: 5
Views: 90
Posted By stj
Re: Am I reading this right? (help?)

follow the optoisolator led pins - it's halfway down on the right and looks like a zener diode in a box with 3 legs.
Forum: All Others Motherboards Yesterday, 12:06 PM
Replies: 7
Views: 80
Posted By stj
Re: Bad Cap on Networking Equipment (AXEL PLatine Terminal AX3000/M65E)

you should check the inductor next to the broken cap,
shorting the cap shouldnt change anything.

if the inductor is good - check the 4 diodes.
Forum: All Others Motherboards Yesterday, 12:03 PM
Replies: 5
Views: 35
Posted By stj
Re: Advantech PCM-5862 recap & general fixup

it's not a replacement,
it's an expansion rom.
you put it on a network card or some other isa card with a socket.

i suppose you could merge it into the original if there was space left in the...
Forum: Troubleshooting TVs and Video Sources Yesterday, 12:01 PM
Replies: 16
Views: 102
Posted By stj
Re: Samsung UN46D6003SFXZA screen dark then bright

i think your losing some blue bits - maybe a bad buffer ram or bad soldering on the scaler chip.
Forum: Troubleshooting TVs and Video Sources Yesterday, 11:51 AM
Replies: 7
Views: 134
Posted By stj
Re: Advice needed! Samsung tv

VIPer switching regulator.
made by ST
http://www.st.com/web/catalog/sense_power/FM142/CL1454/SC432/SS1835/PF215018
Forum: Troubleshooting Laptops & Notebooks Yesterday, 11:44 AM
Replies: 4
Views: 46
Posted By stj
Re: Dell Inspiron 1525-plug in not charging

go into the bios and see if it recognises the charger model.

some of these shit dell's have a serial memory in the charger that the bios checks.
if the chip fails - or more common the cable...
Forum: All Others Motherboards Yesterday, 11:28 AM
Replies: 5
Views: 35
Posted By stj
Re: Advantech PCM-5862 recap & general fixup

for big harddrives:
https://code.google.com/p/xtideuniversalbios/
Forum: General Capacitor Questions & Issues Yesterday, 11:23 AM
Replies: 6
Views: 122
Posted By stj
Re: Help identifying two capacitors, one Matushita & one K.K

for the 85' one, i'd use rubycon YXA - those are standard esr 105'

is that a k6-2 cpu? that's a *very* small sink & fan.
Forum: General Electronics Technical Discussion Yesterday, 11:06 AM
Replies: 5
Views: 90
Posted By stj
Re: Am I reading this right? (help?)

what a train-wreck of a psu - it looks like the crap samsung comes up with!

scope the primary transformer pins - with 600v+ probes!
or check the high and low side fet's for shorts (page 59)
if...
Forum: Troubleshooting TVs and Video Sources Yesterday, 10:53 AM
Replies: 46
Views: 383
Posted By stj
Re: Sony KDL55EX720 won't turn on

well same thing,
you need power to the led driver board,
and a "power-on" signal.
Forum: Troubleshooting TVs and Video Sources Yesterday, 10:50 AM
Replies: 7
Views: 134
Posted By stj
Re: Advice needed! Samsung tv

i'd be more inclined to suspect the nearby diode or chip geting cooled at the same time.
that or the resistor is getting hot because it's connected to something that is pulling too much power.
Forum: Troubleshooting TVs and Video Sources Yesterday, 10:47 AM
Replies: 14
Views: 198
Posted By stj
Re: power supply board BN44-00438B repair

can i just ask what the mains voltage is in your country?
Forum: Troubleshooting TVs and Video Sources Yesterday, 01:59 AM
Replies: 3
Views: 84
Posted By stj
Re: 50HP66 Display Problems

you didnt say the make!
Forum: Troubleshooting TVs and Video Sources Yesterday, 01:57 AM
Replies: 46
Views: 383
Posted By stj
Re: Sony KDL55EX720 won't turn on

led's?

if you mean the tubes,
you need to have 12v going into the invertor,
then just put 3-5v on the p-on / lamp pin.
why? just getting the lights on wont tell you if the panel is bad.
Forum: General Electronics Technical Discussion Yesterday, 01:50 AM
Replies: 6
Views: 262
Posted By stj
Re: Terminal Strip Block & Connectors QUALITY

it's not just the tool,
it's the quality of the crimp-terminals.

btw, what about these?
http://www.hellermanntyton.us/products.aspx?cat=1160
Forum: Troubleshooting Computer Displays 04-23-2014, 01:08 PM
Replies: 5
Views: 66
Posted By stj
Re: (Generic) CCFL replacement - uneven lighting? - 223BW

if you mean a pot on the lcd panel - DONT TOUCH IT.
that's the screen bias control.
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