AliExpress MOSFETs Are They Real or Fake? Why Did My Repaired PSU Blow Up AGAIN?

Sometimes you can replace the faulty components in a switch mode PSU only to plug it in and watch your shiny new parts self destruct. I recently have this problem with a power supply that blew up even though it was connected to a current limiter (light bulb). In the previous video I reverse engineered the PSU and eliminated just about every possible reason for it to fail again. What I was left with were either fake Replacement Mosfets or a couple of hard to test fault conditions. Previous videos on this repair    • How To Repair A Switch Mode Power Supply W...      • How To Repair A Switch Mode Power Supply W...      • How To Repair A Switch Mode Power Supply W...   👉Click on the link https://s.click.aliexpress.com/e/_EvY... or enter the search code [AYGNN4] on the AliExpress homepage and don't forget to enjoy extra savings with the exclusive discount codes below. 🌟 Remember, these codes can be used on almost all items in selected countries on AliExpress. $3 off on orders over $29:【IFP9R2LA】 $6 off on orders over $59:【IFPCRNHA】 $9 off on orders over $89:【IFPKOS53】 $16 off on orders over $149:【IFPKB8ST】 $23 off on orders over $199:【IFPGX1QP】 $30 off on orders over $269:【IFPF08I5】 $40 off on orders over $369:【IFPE3N2J】 $50 off on orders over $469:【IFPJXACE】 $60 off on orders over $599:【IFPT9KEP】 $70 off on orders over $699:【IFPHKAMQ】 Valid until 1st July 2026 For All Your PCB needs: free $5 discount coupon https://www.pcbway.com/setinvite.aspx... Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission. ANENG AN8009 MULITIMETER https://s.click.aliexpress.com/e/_DDG... https://amzn.to/4da4Q7h https://amzn.to/4fsjkkm https://amzn.to/3yuf03q https://amzn.to/4fwQOOD VC480C+ MILLIOHM METER https://s.click.aliexpress.com/e/_Dk0... https://amzn.to/46Gg1Cm https://amzn.to/3YwUjyn MESR-100 ESR METER https://amzn.to/3yxQ0Zd https://amzn.to/3WSr73A https://s.click.aliexpress.com/e/_DCY... XC6013L CAPACITOR METER https://s.click.aliexpress.com/e/_DBm... https://amzn.to/4cf2lzm https://amzn.to/4dw9cp5 LCR-T4 COMPONENT ANALYZER https://s.click.aliexpress.com/e/_DBE... https://amzn.to/3X4rOHv https://amzn.to/3Agcj6h FNB58 USB ANALYZER https://s.click.aliexpress.com/e/_DCR... https://amzn.to/3MgBFnn https://amzn.to/4dyLU1H PCI POST ANALYZER https://s.click.aliexpress.com/e/_DFl... https://amzn.to/4dd8ihw https://amzn.to/3LTpeO7 TL460S PLUS PCI_E ANALYZER https://s.click.aliexpress.com/e/_DDT... https://amzn.to/3WEsdi6 TOOLTOP ET120MC2 SCOPE https://s.click.aliexpress.com/e/_DkC... https://amzn.to/4dCaz5L https://amzn.to/4dxOYLt FNIRSI 1014D SCOPE https://s.click.aliexpress.com/e/_Dm6... https://amzn.to/3AdZqK1 NPS3010W 30V 10A PSU https://s.click.aliexpress.com/e/_Dc9... https://amzn.to/4dzl2yM T12 STATION WITH M8 9501 HANDLE https://s.click.aliexpress.com/e/_Des... https://amzn.to/46E73W6 M8 9501 HANDLE https://s.click.aliexpress.com/e/_Dkm... YIHUA 982 Soldering Station C210/C245 https://s.click.aliexpress.com/e/_DF8... FNIRSI HS-02 PORTABLE SOLDERING C210/C245 https://s.click.aliexpress.com/e/_DCf... https://amzn.to/3Yv7Ma5 QUICK 861DW https://s.click.aliexpress.com/e/_Dds... https://amzn.to/3WDF4B5 https://amzn.to/4ci7rdW PROS'KIT SS-331H https://s.click.aliexpress.com/e/_DDS... INFIRAY P2 PRO IR CAMERA + MACRO LENS https://s.click.aliexpress.com/e/_Dnd... https://amzn.to/4coSRle https://amzn.to/4coSV4s TOOLTOP ET13S THERMAL CAMERA METER https://s.click.aliexpress.com/e/_DEx... ET13S MACRO LENS https://s.click.aliexpress.com/e/_Dlw... OPTICAL MICROSCOPE https://s.click.aliexpress.com/e/_DmP... https://amzn.to/4dzBA9G TOMLOV TM4K AF FLEX https://amzn.to/3LY0YKs https://tomlov.com/products/tomlov-tm... TL866 II+ PROGRAMMER https://s.click.aliexpress.com/e/_DDF... https://amzn.to/3SGKL05 CH341 PROGRAMMER https://s.click.aliexpress.com/e/_DCk... NC-559-ASM FLUX https://s.click.aliexpress.com/e/_DeG... DESOLDER BRAID (I use size 8045) https://s.click.aliexpress.com/e/_DnF... https://s.click.aliexpress.com/e/_Deo... HX-T100 SOLDER (0.6MM) https://s.click.aliexpress.com/e/_DnO... ESD-11 TWEEZERS https://s.click.aliexpress.com/e/_Ddl... Learn Electronics Repair is now on Discord!   / discord   If you would like to support this channel You can send donations https://www.paypal.com/paypalme/youtu... You can subscribe to Patreon   / learnelectronicsrepair   You can click Join to become a channel member Thank you Richard